题目内容
直接写出得数. 1.8×0.3= |
0.05×0.8= | 0.2+0.85= |
8.4÷0.4= | 1-0.25= | 4.32-3.98= |
3.6÷45= | 80.8÷12.5= | 2.4×1.02= |
18.9-(9.9+0.48)= | (2.5-0.25)×0.4= | 10-0.43-2.57= |
8.53+6-8.53+6= | 2.65+0.98+0.35= |
分析:本题根据小数的加法,减法,乘法,除法的运算法则计算即可;
18.9-(9.9+0.48)=18.9-9.9-0.48;
(2.5-0.25)×0.4=2.5×0.4-0.25×0.4;
10-0.43-2.57=10-(0.43+2.57);
2.65+0.98+0.35=(2.65+0.35)+0.98由此进行计算更加简单.
18.9-(9.9+0.48)=18.9-9.9-0.48;
(2.5-0.25)×0.4=2.5×0.4-0.25×0.4;
10-0.43-2.57=10-(0.43+2.57);
2.65+0.98+0.35=(2.65+0.35)+0.98由此进行计算更加简单.
解答:
解: 1.8×0.3=0.54 |
0.05×0.8=0.04 |
0.2+0.85=1.05 |
8.4÷0.4=21 | 1-0.25=0.75 | 4.32-3.98=0.34 |
3.6÷45=0.08 | 80.8÷12.5=6.464 | 2.4×1.02=2.448 |
18.9-(9.9+0.48)=8.52 | (2.5-0.25)×0.4=0.9 | 10-0.43-2.57=7 |
8.53+6-8.53+6=12 | 2.65+0.98+0.35=3.98 |
点评:完成本题要细心分析式中数据,能简便计算的要简便计算.
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