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用递等式计算.(怎样简算怎样算)54×52+54×3213÷5+23×15(47+12)×28[1-(37+514)]÷17x:12=3435+74x=2.
题目详情
用递等式计算.(怎样简算怎样算)
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[1-(
| x:
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▼优质解答
答案和解析
(1)
×
+
×
=
×(
+
)
=
×4
=5;
(2)
÷5+
×
=(
+
)×
=1×
=
;
(3)(
+
)×28
=
×28+
×28
=16+14
=30;
(4)[1-(
+
)]÷
=[1-
]÷
=
÷
=1
;
(5)x:
=
4x=
×3
4x÷4=
÷4
x=
;
(6)
+
x=2
+
x-
=2-
x÷
=
÷
x=
.
5 |
4 |
5 |
2 |
5 |
4 |
3 |
2 |
=
5 |
4 |
5 |
2 |
3 |
2 |
=
5 |
4 |
=5;
(2)
1 |
3 |
2 |
3 |
1 |
5 |
=(
1 |
3 |
2 |
3 |
1 |
5 |
=1×
1 |
5 |
=
1 |
5 |
(3)(
4 |
7 |
1 |
2 |
=
4 |
7 |
1 |
2 |
=16+14
=30;
(4)[1-(
3 |
7 |
5 |
14 |
1 |
7 |
=[1-
11 |
14 |
1 |
7 |
=
3 |
14 |
1 |
7 |
=1
1 |
2 |
(5)x:
1 |
2 |
3 |
4 |
4x=
1 |
2 |
4x÷4=
3 |
2 |
x=
3 |
8 |
(6)
3 |
5 |
7 |
4 |
3 |
5 |
7 |
4 |
3 |
5 |
3 |
5 |
7 |
4 |
7 |
4 |
7 |
5 |
7 |
4 |
x=
4 |
5 |
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