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能简算的要简算.48×(712+13)÷2323-89×34÷12759×7+59×115÷[(23+15)×113]425×101-42578x=2140(解方程)
题目详情
能简算的要简算.
48×(
| 23-
|
| ||||||||||||||||
5÷[(
|
|
|
▼优质解答
答案和解析
①48×(
+
)÷
=(48×
+48×
)÷
=(28+16)÷
=44×
=66;
②23-
×
÷
=23-
×
×27
=23-18
=5;
③
×7+
×11
=
×(7+11)
=
×18
=10;
④5÷[(
+
)×
]
=5÷[
×
]
=5÷
=5×15
=75;
⑤
×101-
=
×(101-1)
=
×100
=16;
⑥
x=
x×
=
×
x=
.
7 |
12 |
1 |
3 |
2 |
3 |
=(48×
7 |
12 |
1 |
3 |
2 |
3 |
=(28+16)÷
2 |
3 |
=44×
3 |
2 |
=66;
②23-
8 |
9 |
3 |
4 |
1 |
27 |
=23-
8 |
9 |
3 |
4 |
=23-18
=5;
③
5 |
9 |
5 |
9 |
=
5 |
9 |
=
5 |
9 |
=10;
④5÷[(
2 |
3 |
1 |
5 |
1 |
13 |
=5÷[
13 |
15 |
1 |
13 |
=5÷
1 |
15 |
=5×15
=75;
⑤
4 |
25 |
4 |
25 |
=
4 |
25 |
=
4 |
25 |
=16;
⑥
7 |
8 |
21 |
40 |
7 |
8 |
8 |
7 |
21 |
40 |
8 |
7 |
x=
3 |
5 |
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