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21%9.8竖式

2 1 - 9.8 ———— 11.2

21 - 9.8 ------ 11.2

18×21=37862×41=2542256÷8=32验算:823÷4=205…3验算:8-3.9=4.16.5-2.7=3.83.8+4.9=8.76+4.6=10.6

62×41=2542 6 2×4 1 . 6 2 2 4 8 2 5 4 2256÷8=32 3 282 5 6 2 4 1 6 1 6 0验算: 3 2× 8. 2 5 6 823÷4=205…3 2 0 548 2 3 8 2 3 2 0 3验算: 2 0 5× 4 . 8 2 0 + 3 8 2 318×21=378 1 8

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