GRADE 2A คณิตคิดเร็ว
1.25+34
1.25+34 59
2.90+20-10
2.90+20-10 100
3.99+41
3.99+41 140
4.55+14
4.55+14 69
5.12+66+14
5.12+66+14 92
6.66+99
6.66+99 165
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