题目内容
用简便方法计算:
(1)(-125)×32×(-1)3×(-0.25);
(2)71
×(-8);
(3)62×(
-
+
).
(1)(-125)×32×(-1)3×(-0.25);
(2)71
| 15 |
| 16 |
(3)62×(
| 1 |
| 4 |
| 5 |
| 9 |
| 7 |
| 12 |
(1)原式=-125×8×4×
=-1000;
(2)原式=(72-
)×(-8)=-576+
=-575
;
(3)原式=36×
-36×
+36×
=9-20+21=10.
| 1 |
| 4 |
(2)原式=(72-
| 1 |
| 16 |
| 1 |
| 2 |
| 1 |
| 2 |
(3)原式=36×
| 1 |
| 4 |
| 5 |
| 9 |
| 7 |
| 12 |
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