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用递等式计算.(1)26+37-50(2)2.5×1.4-8.5÷5(3)(34-18)÷56(4)115÷[(23+15)×126].
题目详情
用递等式计算.
(1)26+37-50
(2)2.5×1.4-8.5÷5
(3)(
-
)÷
(4)
÷[(
+
)×
].
(1)26+37-50
(2)2.5×1.4-8.5÷5
(3)(
3 |
4 |
1 |
8 |
5 |
6 |
(4)
1 |
15 |
2 |
3 |
1 |
5 |
1 |
26 |
▼优质解答
答案和解析
(1)26+37-50
=63-50
=13
(2)2.5×1.4-8.5÷5
=3.5-1.7
=1.8
(3)(
-
)÷
=
÷
=1
(4)
÷[(
+
)×
]
=
÷[
×
]
=
÷
=2
=63-50
=13
(2)2.5×1.4-8.5÷5
=3.5-1.7
=1.8
(3)(
3 |
4 |
1 |
8 |
5 |
6 |
=
5 |
8 |
5 |
8 |
=1
(4)
1 |
15 |
2 |
3 |
1 |
5 |
1 |
26 |
=
1 |
15 |
13 |
15 |
1 |
26 |
=
1 |
15 |
1 |
30 |
=2
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