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计算下列各题,能简算的要简算(1)91100×17+9100÷7+17(2)3-78÷(14+25%)]÷18(3)445÷4+525×14+0.25(4)15÷[815×(56+23)+112].
题目详情
计算下列各题,能简算的要简算
(1)
×
+
÷7+
(2)3-
÷(
+25%)]÷
(3)4
÷4+5
×
+0.25
(4)15÷[
×(
+
)+1
].
(1)
91 |
100 |
1 |
7 |
9 |
100 |
1 |
7 |
(2)3-
7 |
8 |
1 |
4 |
1 |
8 |
(3)4
4 |
5 |
2 |
5 |
1 |
4 |
(4)15÷[
8 |
15 |
5 |
6 |
2 |
3 |
1 |
2 |
▼优质解答
答案和解析
(1)
×
+
÷7+
,
=
×
+
×
+
,
=(
+
+1)×
,
=2×
,
=
;
(2)[3-
÷(
+25%)]÷
,
=[3-
÷
]÷
,
=[3-
]÷
,
=1
÷
,
=10;
(3)4
÷4+5
×
+0.25,
=4
×
+5
×
+
,
=(4
+5
+1)×
,
=11
×
,
=
;
(4)15÷[
×(
+
)+1
],
=15÷[
×
+1
],
=15÷[
+1
],
=15÷
,
=
.
(1)
91 |
100 |
1 |
7 |
9 |
100 |
1 |
7 |
=
91 |
100 |
1 |
7 |
9 |
100 |
1 |
7 |
1 |
7 |
=(
91 |
100 |
9 |
100 |
1 |
7 |
=2×
1 |
7 |
=
2 |
7 |
(2)[3-
7 |
8 |
1 |
4 |
1 |
8 |
=[3-
7 |
8 |
1 |
2 |
1 |
8 |
=[3-
7 |
4 |
1 |
8 |
=1
1 |
4 |
1 |
8 |
=10;
(3)4
4 |
5 |
2 |
5 |
1 |
4 |
=4
4 |
5 |
1 |
4 |
2 |
5 |
1 |
4 |
1 |
4 |
=(4
4 |
5 |
2 |
5 |
1 |
4 |
=11
1 |
5 |
1 |
4 |
=
14 |
5 |
(4)15÷[
8 |
15 |
5 |
6 |
2 |
3 |
1 |
2 |
=15÷[
8 |
15 |
3 |
2 |
1 |
2 |
=15÷[
4 |
5 |
1 |
2 |
=15÷
23 |
10 |
=
150 |
23 |
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