题目内容
脱式计算:
| 1.8-0.48÷1.6 | (
| ||||||||||||||||
(
(
|
[(8.7-7.5)÷0.2]×0.15. |
分析:根据分数、小数的四则混合运算进行计算即可.
解答:解:(1)1.8-0.48÷1.6
=1.8-0.3,
=1.5;
(2)(
-
)×(
÷
)
=
×
,
=1
;
(3)(
+
)×
=
×
,
=
;
(4)
÷[
×(
-
)]
=
÷[
×
],
=
÷
,
=2;
(5)(
-
+
)÷
=(
+
)÷
,
=
÷
,
=21;
(6)[(8.7-7.5)÷0.2]×0.15
=[1.2÷0.2]×0.15,
=6×0.15,
=0.9.
=1.8-0.3,
=1.5;
(2)(
| 5 |
| 8 |
| 1 |
| 4 |
| 8 |
| 9 |
| 4 |
| 15 |
=
| 3 |
| 8 |
| 10 |
| 3 |
=1
| 1 |
| 4 |
(3)(
| 4 |
| 5 |
| 3 |
| 7 |
| 7 |
| 9 |
=
| 43 |
| 35 |
| 7 |
| 9 |
=
| 43 |
| 45 |
(4)
| 2 |
| 9 |
| 5 |
| 6 |
| 4 |
| 5 |
| 2 |
| 3 |
=
| 2 |
| 9 |
| 5 |
| 6 |
| 2 |
| 15 |
=
| 2 |
| 9 |
| 1 |
| 9 |
=2;
(5)(
| 7 |
| 12 |
| 3 |
| 8 |
| 2 |
| 3 |
| 1 |
| 24 |
=(
| 5 |
| 24 |
| 2 |
| 3 |
| 1 |
| 24 |
=
| 21 |
| 24 |
| 1 |
| 24 |
=21;
(6)[(8.7-7.5)÷0.2]×0.15
=[1.2÷0.2]×0.15,
=6×0.15,
=0.9.
点评:此题主要考查的是分数、小数的四则混合运算.
练习册系列答案
相关题目