题目内容
(2008?兴山县)
| 直接写得数 0.77+0.33= |
6.38-(1.9+2.38)= | 0.9+99×0.9= | ||||||||||||
| 7÷1.4= |
|
| ||||||||||||
|
|
| ||||||||||||
87×
|
分析:要想顺利解答这组题目,必须灵活运用加法运算定律及乘法运算定律,尤其乘法运算定律中的乘法分配律的应用.
解答:解:0.77+0.33=1.1; 6.38-(1.9+2.38)=2.1; 0.9+99×0.9=90;
7÷1.4=5;
-
+
=
;
÷
×(1-
)=
;
÷2÷
=0.5;
-
=
;
÷2=
;
87×
=85
;
故答案为:1.1;2.1;90;5;
;
;0.5;
;
;85
.
7÷1.4=5;
| 5 |
| 9 |
| 5 |
| 6 |
| 4 |
| 9 |
| 1 |
| 6 |
| 1 |
| 8 |
| 1 |
| 8 |
| 1 |
| 8 |
| 7 |
| 8 |
| 1 |
| 3 |
| 1 |
| 3 |
| 4 |
| 5 |
| 1 |
| 3 |
| 7 |
| 15 |
| 2 |
| 3 |
| 1 |
| 3 |
87×
| 85 |
| 86 |
| 85 |
| 86 |
故答案为:1.1;2.1;90;5;
| 1 |
| 6 |
| 7 |
| 8 |
| 7 |
| 15 |
| 1 |
| 3 |
| 85 |
| 86 |
点评:这组题目主要考查了乘法分配律的灵活运用及分数的计算法则.
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