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.
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