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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%

编辑:chaxungu时间:2026-04-27 13:18:25分类:小学数学题库

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)[(
8
9
+1
1
3
)×
3
4
-0.75]÷
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)[(
8
9
+1
1
3
)×
3
4
-0.75]÷
1
12
,
=[(
8
9
+1
1
3
)×
3
4
-
3
4
]÷
1
12
,
=[(
8
9
+1
1
3
-1)×
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.