题目内容
直接写出的得数
+
=
-
=
×25%=
÷
=
| 3 |
| 4 |
| 7 |
| 12 |
| 1 |
| 9 |
| 1 |
| 10 |
| 4 |
| 5 |
| 5 |
| 4 |
| 4 |
| 5 |
分析:
+
先通分再相加;
-
先通分再相减;
×25%先把25%化成分数再相乘;
÷
根据除以一个数等于乘这个数的倒数计算.
| 3 |
| 4 |
| 7 |
| 12 |
| 1 |
| 9 |
| 1 |
| 10 |
| 4 |
| 5 |
| 5 |
| 4 |
| 4 |
| 5 |
解答:解:
+
=
;
-
=
;
×25%=
;
÷
=
;
故答案为:
;
;
;
.
| 3 |
| 4 |
| 7 |
| 12 |
| 4 |
| 3 |
| 1 |
| 9 |
| 1 |
| 10 |
| 1 |
| 90 |
| 4 |
| 5 |
| 1 |
| 5 |
| 5 |
| 4 |
| 4 |
| 5 |
| 25 |
| 16 |
故答案为:
| 4 |
| 3 |
| 1 |
| 90 |
| 1 |
| 5 |
| 25 |
| 16 |
点评:本题考查了基本的运算计算时要细心,注意把结果化成最简分数.
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