
用你喜欢的方法计算.(1)1080-63.58-36.42(2)7.05×37+64×
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)[(89+113)×34-0.75]÷112(4)85×0....
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)[(89+113)×34-0.75]÷112(4)85×0.75+15×75%
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(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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