题目内容
计算:
(1)(-7)×(-
)×
.
(2)9
×15.
(3)(
-
+
-
)×36.
(1)(-7)×(-
| 4 |
| 3 |
| 5 |
| 14 |
(2)9
| 2 |
| 5 |
(3)(
| 7 |
| 9 |
| 5 |
| 6 |
| 3 |
| 4 |
| 7 |
| 18 |
(1)原式=7×
×
=
;
(2)原式=
×15=141;
(3)原式=
×36-
×36+
×36-
×36=28-30+27-14=11.
| 4 |
| 3 |
| 5 |
| 14 |
| 10 |
| 3 |
(2)原式=
| 47 |
| 5 |
(3)原式=
| 7 |
| 9 |
| 5 |
| 6 |
| 3 |
| 4 |
| 7 |
| 18 |
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