题目内容
用你喜欢的方法计算.
(1)1080-63.58-36.42
(2)7.05×37+64×7.05-7.05
(3)[(
+1
)×
-0.75]÷
(4)85×0.75+15×75%
(1)1080-63.58-36.42
(2)7.05×37+64×7.05-7.05
(3)[(
| 8 |
| 9 |
| 1 |
| 3 |
| 3 |
| 4 |
| 1 |
| 12 |
(4)85×0.75+15×75%
(1)1080-63.58-36.42,
=1080-(63.58+36.42),
=1080-100,
=980;
(2)7.05×37+64×7.05-7.05,
=7.05×(37+64-1),
=7.05×100,
=705;
(3)[(
+1
)×
-0.75]÷
,
=[(
+1
)×
-
]÷
,
=[(
+1
-1)×
]÷
,
=
×
÷
,
=
÷
,
=11;
(4)85×0.75+15×75%,
=85×0.75+15×0.75,
=(85+15)×0.75,
=100×0.75,
=75.
=1080-(63.58+36.42),
=1080-100,
=980;
(2)7.05×37+64×7.05-7.05,
=7.05×(37+64-1),
=7.05×100,
=705;
(3)[(
| 8 |
| 9 |
| 1 |
| 3 |
| 3 |
| 4 |
| 1 |
| 12 |
=[(
| 8 |
| 9 |
| 1 |
| 3 |
| 3 |
| 4 |
| 3 |
| 4 |
| 1 |
| 12 |
=[(
| 8 |
| 9 |
| 1 |
| 3 |
| 3 |
| 4 |
| 1 |
| 12 |
=
| 11 |
| 9 |
| 3 |
| 4 |
| 1 |
| 12 |
=
| 11 |
| 12 |
| 1 |
| 12 |
=11;
(4)85×0.75+15×75%,
=85×0.75+15×0.75,
=(85+15)×0.75,
=100×0.75,
=75.
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