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一.用竖式计算. 0.8×2.1 0.35×20

供参考

0.8×17竖式计算 0.8×17=13.6 有用请采纳。

0.8 × 2.1 = 1.68 竖式见图:

1.5×2.4=3.6 1.5×2.4 . 6 0 3 0 3.6 01.08×2.5=2.7 1.0 8× 2.5 . 5 4 0 2 1 6 2.7 0 01.2×0.35=0.42 1.2×0.3 5 . 6 0 3 6 0.4 2 00.72×3.1=2.232 0.7 2× 3.1 . 7 2 2 1 6 2.2 3 24.6×1.02=4.692 1.0 2× 4.6 . 6 1 2 4 0 8 4.6 9 23.05×1.4=4.27 ...

1.2÷0.8 = 1.5本题除得尽,得到1位小数:

1.36×0.8=1.0888.54÷0.7=12.210-3.14=6.86

16.8 × 0.35 = 5.88

2.1除以0.28=7.5 仅供参考

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