题目内容
口算. 7.85×0= 0 0 |
2.5×4= 10 10 |
7-1.9-4.1= 1 1 |
1÷0.25= 4 4 |
3×1.4= 4.2 4.2 |
12-9.9= 2.1 2.1 |
0.125×16= 2 2 |
0.63÷0.7= 0.9 0.9 |
9.6÷1.2= 8 8 |
5×1.02= 5.1 5.1 |
1.6×9+1.6= 16 16 |
8.4÷0.4= 21 21 . |
分析:根据小数加减乘除法的计算法则进行解答即可.
解答:解:
故答案为:0,10,1,4,4.2,2.1,2,0.9,8,5.1,16,21.
7.85×0=0 | 2.5×4=10 | 7-1.9-4.1=1 |
1÷0.25=4 | 3×1.4=4.2 | 12-9.9=2.1 |
0.125×16=2 | 0.63÷0.7=0.9 | 9.6÷1.2=8 |
5×1.02=5.1 | 1.6×9+1.6=16 | 8.4÷0.4=21. |
点评:此题考查了小数加减乘除法的口算能力,注意运算符号.
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