การคูณ

E-Book E-Book

= 25,000 = 54,000 5 5 = 25 9 6 = 54 5 50 = 250 90 6 = 540 5 500 = 2,500 900 6 = 5,400 5 5,000 = 25,000 9,000 6 = 54,000

3 8,000 = 24,000 6,000 7 = 42,000 3 8 = 24 6 7 = 42 3 80 = 240 60 7 = 420 3 800 = 2,400 600 7 = 4,200 3 8,000 = 24,000 6,000 7 = 42,000 :

1.2 ◦ 3 12 ◦ 1 9, 2 3 5 = 76,940 4 7 6, 9 4 0 4 5 = 20 4 30 = 120 : 4 200 = 800 4 9,000 = 36,000 4 10,000 = 40,000 = 76,940

= =m ◦ ◦ 4 2 41 3 5, 0 0 7 2 0, 0 3 1 6 8 7 1 6 0, 2 4 8 1,1 5 5, 0 4 9

= 150,000 ,348 = 923,480 5 3 = 15 9 2, 3 4 8 50 3 = 150 10 50 30 = 1,500 50 300 = 15,000 9 2 3, 4 8 0 50 3,000 = 150,000 :

2.3 = ◦ ◦ = = ◦ 12 51 6 2 = 512 10 6 = 60 12 10 50 = 500 2 6 = 12 10 200 = 2,000 1 512 2 50 = 100 2 5 60 2 200 = 400 = 2,560 3072 = 512 = 3,072

=A 2 1 73 73 42 42 294 294 294 85 85 85 1470 1470 1470 23520 23520 24990

=F 2 113 114 1 1 13 43271 11 4 43271 56 43271 56 259626 1 11 56 2163550 259626 259626 2163550 2423176