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计算(1)1.3×14−12×0.25+0.2÷4(2)[(113−815)×75%+14]÷1720(3)[14.8+(627-4.5)×1325]÷223(4)12+16+112+120+130+142.
题目详情
计算
(1)1.3×
−
×0.25+0.2÷4
(2)[(1
−
)×75%+
]÷
(3)[14.8+(6
-4.5)×1
]÷2
(4)
+
+
+
+
+
.
(1)1.3×
1 |
4 |
1 |
2 |
(2)[(1
1 |
3 |
8 |
15 |
1 |
4 |
17 |
20 |
(3)[14.8+(6
2 |
7 |
3 |
25 |
2 |
3 |
(4)
1 |
2 |
1 |
6 |
1 |
12 |
1 |
20 |
1 |
30 |
1 |
42 |
▼优质解答
答案和解析
(1)1.3×
−
×0.25+0.2÷4,
=1.3×
-0.5×
+0.2×
,
=(1.3-0.5+0.2)×
,
=1×
,
=
;
(2)[(1
−
)×75%+
]÷
,
=[(
-
)×
+
]÷
,
=[
×
+
]÷
,
=[
+
]÷
,
=
÷
,
=1;
(3)[14.8+(6
-4.5)×1
]÷2
,
=[14.8+(
-
)×
1 |
4 |
1 |
2 |
=1.3×
1 |
4 |
1 |
4 |
1 |
4 |
=(1.3-0.5+0.2)×
1 |
4 |
=1×
1 |
4 |
=
1 |
4 |
(2)[(1
1 |
3 |
8 |
15 |
1 |
4 |
17 |
20 |
=[(
4 |
3 |
8 |
15 |
3 |
4 |
1 |
4 |
17 |
20 |
=[
4 |
5 |
3 |
4 |
1 |
4 |
17 |
20 |
=[
3 |
5 |
1 |
4 |
17 |
20 |
=
17 |
20 |
17 |
20 |
=1;
(3)[14.8+(6
2 |
7 |
3 |
25 |
2 |
3 |
=[14.8+(
44 |
7 |
9 |
2 |
作业帮用户
2017-10-04
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