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(2011•富源县)计算(1)0.25÷[47×(1−18)](2)375+450÷18(3)98×43+(1−23)(4)(0.75-112)
题目详情
(2011•富源县)计算
(1)0.25÷[
| (2)375+450÷18 | ||||||||
(3)
| (4)(0.75-
|
▼优质解答
答案和解析
(1)0.25÷[
×(1−
)],
=0.25÷[
×
],
=0.25÷
,
=0.5;
(2)375+450÷18,
=375+25,
=400;
(3)
×
+(1−
),
=
×
+
,
=
+
,
=
;
(4)0.75-
,
=
-
,
=
.
(1)0.25÷[
4 |
7 |
1 |
8 |
=0.25÷[
4 |
7 |
7 |
8 |
=0.25÷
1 |
2 |
=0.5;
(2)375+450÷18,
=375+25,
=400;
(3)
9 |
8 |
4 |
3 |
2 |
3 |
=
9 |
8 |
4 |
3 |
1 |
3 |
=
3 |
2 |
1 |
3 |
=
11 |
6 |
(4)0.75-
1 |
12 |
=
3 |
4 |
1 |
12 |
=
2 |
3 |
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