| 14×20= | 2× = | 1+ - = | ( + )×9= |
72÷ = | 1.5×100= | 1.25×8= | 99×0.8+0.8= |
| 3.14×20= | 2× = | 1+ - = | ( + )×9= |
72÷ = | 1.5×100= | 1.25×8= | 99×0.8+0.8= |
| 14×20=280 | 2× =![]() | 1+ - =1![]() | ( + )×9=9 |
72÷ =32 | 1.5×100=150 | 1.25×8=10 | 99×0.8+0.8=80 |
| 3.14×20=62.8 | 2× =![]() | 1+ - =1![]() | ( + )×9=9 |
72÷ =32 | 1.5×100=150 | 1.25×8=10 | 99×0.8+0.8=80 |
分析:根据整数、小数、分数的加减乘除法的计算方法进行简算即可.
点评:考查了整数、小数、分数的加减乘除法的口算能力,注意认真计算即可.
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