题目内容
直接写得数
1.25×0.25×0.4
+
-
+
1-
÷
3.9×0.1÷3.9×0.1
0×4.5×101.52
14
÷
-
2.9+3.2
10.1-1.
1.25×0.25×0.4
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
1-
3 |
2 |
2 |
3 |
3.9×0.1÷3.9×0.1
0×4.5×101.52
14
7 |
8 |
7 |
8 |
1 |
3 |
1 |
4 |
2.9+3.2
10.1-1.
分析:①运用乘法结合律简算;②运用加法交换律与结合律简算;③先算除法,再算减法;④从左往右依次计算;⑤0乘任何数都得0;⑥把14
拆成14+
,运用除法的性质简算;⑦通分计算;⑧⑨注意数位对齐.
7 |
8 |
7 |
8 |
解答:解:1.25×0.25×0.4=0.125;
+
-
+
=
;
1-
÷
=-
;
3.9×0.1÷3.9×0.1=0.01;
0×4.5×101.52=0;
14
÷
=17;
-
=
;
2.9+3.2=6.1;
10.1-1=9.1.
故答案为:0.125,
,
,0.01,0,17,
,6.1,9.1.
1 |
2 |
1 |
3 |
1 |
2 |
1 |
3 |
2 |
3 |
1-
3 |
2 |
2 |
3 |
5 |
4 |
3.9×0.1÷3.9×0.1=0.01;
0×4.5×101.52=0;
14
7 |
8 |
7 |
8 |
1 |
3 |
1 |
4 |
1 |
12 |
2.9+3.2=6.1;
10.1-1=9.1.
故答案为:0.125,
2 |
3 |
5 |
4 |
1 |
12 |
点评:解答此题,运用了通分、数位对齐、运算定律等知识.

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