题目内容
直接写得数. 10÷0.01= |
0.22+0.8= |
10-2.05= |
3.5×0.4= |
4÷0.25= |
0÷19.8= | 0.2×0.05= | 0.6×1.5= | 1.36+2.87+3.64= | 1.8×0.4×0.25= |
分析:①⑤把被除数和除数分别扩大100倍,计算即可;②③注意数位对齐;④⑦⑧去掉小数点,先算整数乘整数然后在结果中从后向前数出小数的位数,点上小数点即可;⑥0除以任何数都得0;⑨运用附加法交换律与结合律简算;⑩运用乘法结合律简算.
解答:解:10÷0.01=1000; 0.22+0.8=1.02; 10-2.05=7.95; 3.5×0.4=14; 4÷0.25=16;
0÷19.8=0; 0.2×0.05=0.01; 0.6×1.5=0.9; 1.36+2.87+3.64=7.87; 1.8×0.4×0.25=0.18;
0÷19.8=0; 0.2×0.05=0.01; 0.6×1.5=0.9; 1.36+2.87+3.64=7.87; 1.8×0.4×0.25=0.18;
点评:此题综合考查了小数的四则运算,类型齐全,根据题目特点,灵活解答.
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直接写得数.
10÷0.01= | 0.22+0.8= | 10-2.05= | 3.5×0.4= | 1.8×0.4×0.25= |
4÷0.25= | 0÷19.8= | 0.2×0.05= | 0.6×1.5= | 1.36+2.87+3.64= |