Grade 2 Student Edition

Choosing a Strategy to Subtract Subtract. Which way works best for you?14 – 6 = I like to I like to use use the break-apart Dot Card. numbers. 14 – 6 = 8 42 to get ten the rest I like to use the number line. –6 –2 –4 8 10 14Circle the way that works best for you. Subtract.1. 13 – 5 = 2. 15 – 7 = 13 – 5 = 15 – 7 = to get to ten the rest to get to ten the rest -5 -7 13 15Chapter 1 Lesson 19 OA.2 39

Circle the way that works best for you. Subtract.1. 13 – 6 = 2. 14 – 7 = 14 – 7 = 13 – 6 = to get ten the rest to get ten the rest –7 –6 14 13Subtract. 4. 5. 6. 7. 3. 11 13 11 14 –4 –4 –6 –5 15 –7Fill in the math puzzle and write the number sentence.Use a for the unknown number. Solve.8. Pat has 15 flowers. 8 flowers are in a vase. Whole The rest are in a basket. Part Part How many flowers are in a basket? Number sentence: ______ flowers are in a basket.40

Subtracting a Lot from a Teen Number When we subtract a lot, we cross off dots only on the tens side and see how many dots are left on both sides.13 – 8 = 5Cross off the dots you need to subtract. Write the difference. 1. 2. 3. 16 – 9 = 14 – 8 = 18 – 10 =4. 5. 6. 11 – 7 = 13 – 9 = 12 – 7 =7. 8. 9.15 – 9 = 13 – 7 = 16 – 8 =Chapter 1 Lesson 20 OA.2 41

Subtract. You can use the Dot Cards to help.1. 3. 5. 14 – 10 = 17 – 10 = 18 – 10 =2. 4. 6. 14 – 9 = 17 – 9 = 18 – 9 =7. 9. 11. 12 – 10 = 13 – 10 = 11 – 10 =8. 10. 12. 12 – 9 = 13 – 8 = 11 – 9 =Practice. 14. 15. 16. 17. 18.13. 11 14 11 13 12 16 –8 –8 –7 –7 –8 –10LET’S WRITE!Look at exercise 18. Explain how you solved 12 – 8._________________________________________________________________________________________________________________ 42

Mixed Practice: Teen Subtraction When we subtract more than the ones that there are: 13 13 –8 –4 59If the number we are subtracting If not, we subtract in two steps.is close to 10, we subtract from First we subtract all the ones,the ten. and then we subtract the rest from the ten.Decide how to subtract. Cross off the dots and write the difference.1. 14 2. 14 3. 14 –5 –9 –84. 12 5. 12 6. 12 –5 –8 –37. 11 8. 11 9. 11 –9 –4 –610. 13 11. 13 12. 13 –5 – 10 –7Chapter 1 Lesson 21 OA.2 43

Decide how to subtract. Cross off the dots and write the difference.1. 15 2. 15 3. 15 –6 –8 –94. 12 5. 12 6. 12 – 10 –6 –9Subtract. 8. 16 9. 13 10. 14 11. 13 –7 –4 –5 –6 7. 16 –612. 17 13. 17 14. 12 15. 13 16. 15 – 10 – 9 – 8 – 7 – 9Fill in the math puzzle and write the number sentence.Use a for the unknown number. Solve.17. There were 14 ladybugs on a log. Whole 7 of them crawled away. How many ladybugs are on the log now? Number sentence: Part Part ______ ladybugs are on the log now.44

End-of-Chapter RevieXwxxColor the dots and draw an arrow to make a ten.Fill in the break-apart numbers and write the sum. 9+6= 7+5= to get to ten the rest to get to ten the restCircle the addends you will add first.Add. Then add the rest.3. 3 + 6 + 7 = 4. 4 + 4 + 3 = += +=Cross off the dots you need to subtract.Fill in the break-apart numbers and write the difference. 5. 6. 14 – 5 = 13 – 6 = to get to ten the rest to get to ten the restDecide how to subtract. Cross off the dots and write the difference.7. 16 8. 16 9. 16 –7 –9 –8Chapter 1 Lesson 22 O A.2 4455

Write three possible pairs of addends. Abby has 6 folders. Some of the folders have flowers and some of the folders have stripes.1. 6 2. 6 3. 6 Whole Whole WholePart Part Part Part Part Part6 = + 6 = + 6= + Fill in the math puzzle and write the number sentence.Use a for the unknown number. Solve. 4. Aliza has 8 gel pens. 2 gel pens do not have covers. How many gel pens have covers? WholeNumber sentence: Part Part______ gel pens have covers. 5. There are 9 cherries in a bowl. Whole 5 of the cherries are red. Part Part The rest of the cherries are white. How many of the cherries are white? Number sentence: There are ______ white cherries.46

CHAPTER 2Two-Digit NumbersVOCABULARY 10 10 10 Tens 3 1 31Number OnesExpanded Form Tens Ones Greater than Less than Odd and Even 45 =40 + 5

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Write how many. Representing Two-Digit NumbXexrxs 1. 2. Tens Ones Number Tens Ones Number3. 4. Tens Ones Number Tens Ones Number5. 6. Tens Ones Number Tens Ones Number7. 8. Tens Ones Number Tens Ones NumberChapter 2 Lesson 1 CCSS2.NBT.1 49

Write how many. 2. 3. 1.10 10 10 10 10 10 10 10 10Tens Ones Number Tens Ones Number Tens Ones Number4. 5. 6.10 10 10 10 10 10 10 1010 10 10 10Tens Ones Number Tens Ones Number Tens Ones Number7. 8. 9.Dimes Pennies ¢ Dimes Pennies ¢ Pennies ¢10. In all 11. In all Dimes In all 12.Dimes Pennies ¢ Dimes Pennies ¢ Dimes Pennies ¢50 In all In all In all

Place Value 35 53 The 3 in 35 The 3 in 53 is in the tens place. is in the ones place.The value of the 3 in 35 is 30. The value of the 3 in 53 is 3.Write how many.1. 2. 3.38 56 84 Tens Ones Tens Ones Tens Ones4. 5. 6. 67 75 49Tens Ones Tens Ones Tens OnesCircle the value of the digit that is underlined. 9.7. 8. 74 54 38 five fifty eight eighty seven seventy10. 11. 12. 92 43 63nine ninety four forty three thirty 51Chapter 2 Lesson 2 CCSS2.NBT.3

Circle the correct number. 3. 1. 2.10 10 10 10 10 10 10 10 10 10 39 93 25 52 27 724. 5. 6.34¢ 43¢ 24¢ 42¢ 16¢ 61¢Make a simple math drawing to show the number.7. 15 8. 43 9. 26Draw coins to show the amount.10. 32¢ 11. 23¢ 12. 41¢ dd d p p52

Expanded FormWhen we write in expanded form, we write the tens plus the ones. The expanded form of 36 is 30 + 6.Write how many in all. Then complete the expanded form. 1. 2. = 20 + = +53. 4. = 50 + = 20 +5. 6. = +4 = +3 53Chapter 2 Lesson 3 CCSS2.NBT.3

Write True or False. 2. 48 = 40 + 5 1. 37 = 30 + 73. 87 = 70 + 8 4. 64 = 60 + 45. 56 = 50 + 6 6. 79 = 70 + 97. 96 = 60 + 9 8. 25 = 20 + 3Complete the expanded form.9. 57 = 50 + 10. 68 = + 8 11. = 20 + 612. 94 = + 4 13. = 80 + 2 14. 39 = +915. 23 = 20 + 16. 46 = + 6 17. = 70 + 3Write the number in expanded form.18. 42 = + 19. 91 = + + 20. 63 = + 21. 34 = + +22. 23. 59 = 28 =54

Comparing Numbers Al the alligator likes the greater number. He opens his mouth to the number that is greater.47 42 42 47 47 is greater than 42. 42 is less than 47.Compare. Write > or <.1. 52 34 2. 61 73 3. 84 724. 5. 87 6. 5636 18 96 487. 76 8. 49 9. 32 27 67 58Circle the correct word.10. greater 11. greater 83 is than 58. 64 is than 73. less less12. greater 13. greater 43 is than 51. 91 is than 82. less lessChapter 2 Lesson 4 CCSS2.NBT.4 55

Fill in the numbers to make the sentence true. 3. 1. 2.83 62 47 62 27 23_____ is greater than _____. _____ is greater than _____. ______ is greater than _____. 4. 5. 6.37 44 26 19 74 79______ is less than ______. _____ is less than _____. ______ is less than ______. 7. 8. 9.53 60 84 80 57 52_____ is greater than _____. _____ is less than _____. _____ is greater than _____.Write the amount. Circle the correct word. ¢ ¢10. greater ¢ is than less11. greater ¢ is than less56

Counting by Fives1. Complete the 100 board. 1 2 3 4 5 6 7 8 9 1011 12 13 14 15 16 17 18 19 2021 22 23 24 26 27 28 2931 32 33 34 36 37 38 3941 42 43 44 46 47 48 4951 52 53 54 56 57 58 5961 62 63 64 66 67 68 6971 72 73 74 66 77 78 7981 82 83 84 86 87 88 8991 92 93 94 96 97 98 99Count by fives. Write the number. 2.3.Chapter 2 Lesson 5 CCSS2.NBT.2 57

= front back A nickel is equal to 5¢.Count by fives. Write the amount. 1.____¢ ____¢ ____¢ ____¢ ____¢ ____¢____¢ ____¢ ____¢ ____¢ ____¢ ____¢ In allDraw to show the amount using nickels. 2. 20¢ 3. 35¢Count by fives. Fill in the number line. 4.20 25 35 50 60 65 80 5. 45 5058

Quarters = front back A quarter is equal to 25¢.Circle coins to equal a quarter. 1. =2. =3. =4. =Chapter 2 Lesson 6 CCSS2.MD.7 59

Write the value of each group of coins. 3.Compare. Write >, <, or =.1. 2. ¢ ¢¢ ¢¢ ¢4. 5. 6. ¢¢ ¢¢¢¢LET’S WRITE!You have a quarter. 5¢ 35¢ 20¢ 25¢What would you buy?Explain your answer.________________________________________________________________________________________________________________________________________________________www._VectorO_penSto_ck.com________________60

Ten More, Ten Less 10Ten less than 38 Ten more than 38 is 28. is 48.Write the number that is ten more. 2. 1. Ten more than 46 is . Ten more than 35 is .3. 4.Ten more than 13 is . Ten more than 54 is . 6. 61Write the number that is ten more. 29,5. 63, 7. 8. 78, Lesson 7 81,Chapter 2 CCSS2.NBT.8

Write the number that is ten less. 2. 1. Ten less than 42 is . Ten less than 68 is .3. 4. Ten less than 34 is . Ten less than 53 is .Write the number that is ten less.5. 75 6. 27 7. 61 8. 98Solve.9.Connor has 55¢. Oscar has 10¢ more than Connor.How much money does Oscar have?Oscar has ¢10. Ava read 48 pages on Monday. She read 10 fewer pages on Tuesday. How many pages did Ava read on Tuesday?Ava read pages on Tuesday.62

Counting On by Tens Count on by tens. Write how many. 1. 2.10 10 24 10 10 35 1010 10 10 10 10 1010 10 10 10 1010 10 10 10 10 10Count on by tens. Fill in the numbers.3. 18, 28, 38, ___ , ___ , ___4. 36, 46, 56, ___ , ___ , ___5. 22, 32, 42, ___ , ___ , ___6. 3, 13, 23, ___ , ___ , ___Chapter 2 Lesson 8 CCSS2.NBT.2 63

Write the amount. 1. ¢ ¢ ¢ ¢ In all2. ¢ ¢ ¢ ¢ ¢ In all3. ¢ ¢ ¢ ¢ ¢ ¢Draw to show the amount using dimes and nickels. In all 4. 45¢5. 75¢Count by tens. Fill in the number line. 60 6. 20 50 7. 97 47 5764

Counting a Collection of CoinsWrite the amount of money. 1. ¢ ¢¢¢ In all2. ¢ ¢ ¢ ¢ ¢ In all3. ¢ ¢ ¢ ¢ ¢ In all4. ¢ ¢ ¢ ¢ ¢ In all5. ¢ ¢ ¢ ¢ ¢ ¢ In all6. ¢ ¢ ¢ ¢ ¢ ¢ In allChapter 2 Lesson 9 CCSS2.MD.8 65

Write the amount of money. Circle the P if there is enough money tobuy the item. Circle the O if there is not enough.1. 27¢ PO ¢ ¢2. 51¢ ¢ PO3. 42¢ PO4. 23¢ PO ¢5. 31¢ P O ¢Write the value of each set of coins.Which set of coins has the greater value? Use <, >, or =. 6. ¢¢7.66 ¢ ¢

Making Equal Collection of CoinsWrite the amount of money.Show the amount in a different way. 1. dn n p ¢ 2. ¢3. ¢4. ¢5. ¢ 67Chapter 2 Lesson 10 CCSS2.MD.8

Show the amount in two ways. One Way Another Way1. n 16¢ d d q2. d 23¢ d3. 41¢ d4. q 50¢Write the amount. Draw an X to show which set of coins is not enoughto pay for the item. 5. 35¢ ¢¢ ¢68

Odd and EvenWe can make pairs to find if a number is odd or even.If we can make pairs with none If we can make pairs with oneleft over, the number is even. left over, the number is odd.There are none left over. There is one left over.Six is an even number. Five is an odd number.Write the number. Circle Odd or Even. 3. 1. 2. Odd Odd Odd Even Even Even4. 5. 6. Odd Odd Odd Even Even Even7. 8. 9. Odd EvenOdd OddEven Even 69Chapter 2 Lesson 11 CCSS2.0A.8

Write the number. Circle Odd or Even. Odd 1. 2. Even Odd Odd Even Even 3. 4. Odd Even Odd Even 5. 6. Odd Even 7. Circle the numbers that are odd. 12, 7, 15, 3, 14, 18, 11, 9, 16 8. Circle the numbers that are even. 11, 6, 17, 18, 14, 5, 13, 8, 19 70

Write how many. End-of-Chapter Review 1. 2.Tens Ones Number Tens Ones NumberCircle the correct number.3. 4. 5. 10 10 1100 1023 32 14 41 13¢ 31¢ +Write the number in expanded form. 8.6. + 7. + 85 =63 = 52 =Compare. Write > or <.9. 10. 57 11. 47 54 66 43 40Count by fives. Fill in the number line. 8012. 7140 45 60 65Chapter 2 Lesson 12 CCSS2.0A.2

Write the number that is ten less and the number that is ten more.1. ____ , 51, ____ 2. ____ , 74, ____Count by tens. Fill in the number line. 93 3. 13 23 33Write the amount of money. 4. ¢ ¢ ¢ ¢ ¢ ¢ In all5. ¢ ¢ ¢ ¢ ¢ ¢ In allShow the amount in two ways. 6. 26¢ 7. 15¢Write which numbers from 1 to 17 are odd and which are even.8. Odd Numbers Even Numbers72

3CHAPTER Addition with Two-Digit NumbersVOCABULARY 36 + 21 = 57 +21 +1 36 56 57Missing addend +20 Regrouping Break-apart numbers Columns CENTRALE LYON 46 + 24 = 70 46 +24 +4 66 70 25CENTRALE LYON CENTRALE LYON +20 45CENTRALE LYON65 +8 33 Tens Ones 53 +5 30 +3 CENTRALE LYON 73 1 4 8 +3 7 +5 50 85 +3 CCEENNTTRRAALLEE LLYYOONN +5 70 +3

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Adding Ones to Two-Digit NumbXexrxsTo add single digits to a two-digit number, add the ones.Write the number sentences and solve. 1. 2. + = + =3. 4. + = + =5. 6. + = + =7. 8. += +=Chapter 3 Lesson 1 75

Add. 65 2. 3 23 3. 5 75 +3 +4 + 4 +4 +4 1. 5 +34. 2 8 2 5. 4 5 4 6. 2 32 +6 + 6 +4 + 4 +7 + 77. 8. 9. 10. 11. 50 42 34 80 73 +3 +5 +5 + 5 + 412. 2 3 13. 6 0 14. 5 1 15. 3 0 16. 9 1 +5 +8 + 6 +7 + 5Fill in the math puzzle and write a number sentence.Use a for the unknown number. Solve.17. Patty baked cupcakes. 12 cupcakes have sprinkles. 7 cupcakes have chocolate chips. How many cupcakes did Patty bake? Whole Number sentence: Part Part Patty baked cupcakes.76

Adding to the Next TenSometimes when we add ones to a two-digitnumber, another ten is formed. We have 4 tens and 6 ones. We add 4 ones. Now we have another ten. We have 5 tens – 50 in all. 6 and 4 form a ten. 46 + 4 = 50Write the number sentences and solve. 1. 2. += +=3. 4. += +=Write the number sentence for each group of coins and solve.5. 6.+ ++ +Chapter 3 Lesson 2 77

Add. 48 2. 6 3 6 3. 3 63 +2 +4 + 4 +7 +71. 8 +24. 1 8 1 5. 5 2 5 6. 4 74+9 + 9 +5 + 5 +6 + 6Write the number sentence that will help solve the exercise.Solve.7. 56 + 4 = 8. 73 + 7 = + = + =9. 42 + 8 = 10. 85 + 5 = + = + =11. 17 + 3 = 12. 34 + 6 = += +=Add.13. 14. 15. 76 + 4 = 45 + 5 = 31 + 9 =16. 17. 18. 27 + 3 = 61 + 9 = 55 + 5 =19. 20. 21. 42 + 8 = 37 + 3 = 64 + 6 =78

Adding to the Next TenWhen the ones that are added together form a new ten,we jump to the next ten on the number line. 7 + 3 makes a ten.27 + 3 = 30 +3 27 30Complete the number line. Write the sum.1. 34 + 6 = 2. 42 + 8 = 34 423. 66 + 4 = 4. 58 + 2 = 66 585. 75 + 5 = 6. 21 + 9 = 75 217. 87 + 3 = 8. 13 + 7 = 87 13Chapter 3 Lesson 3 79

Add. Complete the number line. 1. 5656 + 4 =56 + 4 + 2 = 2. 4848 + 2 =48 + 2 + 6 = 3. 3737 + 3 =37 + 3 + 4 = 4. 6565 + 5 =65 + 5 + 2 = 5. 74 74 + 6 = 74 + 6 + 3 =80

Finding the Missing AddendDraw more dots to find how much is needed to formthe next ten. Complete the number sentence. 1. 2. 26 + = 30 57 + = 603. 4. 68 + = 70 75 + = 805. 6. 47 + = 50 72 + = 807. 8. 29 + = 30 31 + = 40Chapter 3 Lesson 4 81

If I know how much I need to form a ten,then I know how much I need to form the next ten.Fill in the missing addend to complete the number sentence.1. 8 + = 10 2. 7 + = 10 18 + = 20 27 + = 30 28 + = 30 37 + = 40 38 + = 40 47 + = 503. 6 + = 10 4. 9 + = 10 36 + = 40 49 + = 50 46 + = 50 59 + = 60 56 + = 60 89 + = 905. 2 + = 10 6. 3 + = 10 52 + = 60 43 + = 50 72 + = 80 73 + = 80 82 + = 90 83 + = 907. 5 + = 10 8. 4 + = 10 25 + = 30 34 + = 40 35 + = 40 44 + = 50 65 + = 70 14 + = 20 9. 10. 11. = 20 84 + = 90 41 + = 50 15 +12. 13. 14. = 60 72 + = 80 68 + = 70 53 +82

Circle the addends that combine to Adding Three Addendsform a new ten. Draw dots to add.Add. Then add the rest. We can add in any order to find the sum.1. 2.37 + 4 + 3 49 + 1 + 6 + = + =3. 4.25 + 3 + 5 38 + 2 + 7 + = + =5. 6.47 + 3 + 9 31 + 6 + 9 += + = 83Chapter 3 Lesson 5

Circle the addends that combine to form a new ten.Add. Then add the rest.1. 46 + 5 + 4 2. 38 + 3 + 2 += +=3. 55 + 5 + 4 4. 67 + 4 + 3 += +=5. 19 + 1 + 6 6. 73 + 2 + 7 += +=7. 28 + 6 + 2 8. 82 + 8 + 1 += +=9. 66 + 4 + 5 10. 54 + 2 + 6 += +=Write the number sentence and solve.11. 12. Eliza has 25 cat stickers, Gary has 16 red marbles, 5 dog stickers, and 2 bear 4 green marbles, and 5 blue stickers. marbles. How many stickers does How many marbles does Gary Eliza have in all? have altogether? ++= ++=Eliza has _____ stickers in all. Gary has _____ marbles altogether.84

Adding Ones with Break-Apart NumbersColor the dots and draw an arrow to We can break apart acomplete the ten. Fill in the break-apart number to add to thenumbers. Write the two-step number next ten and beyond.sentence and fill in the sum.1. 2.29 + 6 = 27 + 5 = to make ten the rest to make ten the rest 29 + + = 27 + + =3. 4.19 + 5 = 17 + 5 = to make ten the rest = to make ten the rest = 19 + + 17 + +5. 6.38 + 6 = 38 + 7 = to make ten the rest = to make ten the rest = 38 + + 38 + +Chapter 3 Lesson 6 85

Color the dots and draw an arrow to complete the ten.Fill in the break-apart numbers.Write the two-step number sentence and fill in the sum. 1. 2. 28 + 5 = 27+ 6 = to make ten the rest = to make ten the rest = 28 + + 27+ +3. 4. 39 + 7 = 37 + 4 = to make ten the rest = to make ten the rest = 39 + + 37 + +5. 78 + 4 = to make ten the rest 78 + + =86

Practice: Adding Ones with Break-Apart Numbers Color the dots and draw an arrow to complete the ten. Fill in the break-apart numbers. Write the two-step number sentence and fill in the sum. 1. 2. 28+ 7 = 19 + 6 = to make ten the rest to make ten the rest 28 + + = 19 + + =3. 4. 18 + 8 = 27 + 5 = to make ten the rest = to make ten the rest = 18 + + 27 + +5. 6. 38 + 8 = 38 + 5 = to make ten the rest = to make ten the rest = 38 + + 38 + +Chapter 3 Lesson 7 87

Color the dots and draw an arrow to complete the ten.Fill in the break-apart numbers. Write the two-stepnumber sentence and fill in the sum. 1. 2.28 + 6 = 27+ 7 = to make ten the rest = to make ten the rest = 28 + + 27+ +3. 4.39 + 8 = 37 + 6 =to make ten the rest = to make ten the rest =39 + + 37 + +Fill in the math puzzle and write a number sentence. WholeUse a for the unknown number. Solve. 5. The elevator has 15 silver buttons and 5 gold buttons on the wall. How many buttons are there in all? Number sentence: Part Part There are _____ buttons in all.88