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(2014•临川区模拟)脱式计算(能简便要简便运算)(259+259+259+259)×0.25[3.6-(1.6+29)-79]×3789×[34-(716-0.25)]7.05×37+64×7.05-7.05.
题目详情
(2014•临川区模拟)脱式计算(能简便要简便运算)
(2
+2
+2
+2
)×0.25
[3.6-(1.6+
)-
]×
×[
-(
-0.25)]
7.05×37+64×7.05-7.05.
(2
5 |
9 |
5 |
9 |
5 |
9 |
5 |
9 |
[3.6-(1.6+
2 |
9 |
7 |
9 |
3 |
7 |
8 |
9 |
3 |
4 |
7 |
16 |
7.05×37+64×7.05-7.05.
▼优质解答
答案和解析
(1)(2
+2
+2
+2
)×0.25
=2
×4×0.25
=2
×(4×0.25)
=2
×1
═2
;
(2)[3.6-(1.6+
)-
]×
=[(3.6-1.6)-(
+
)]×
=[2-1]×
=1×
=
;
(3)
×[
-(
-0.25)]
=
×[
-
+0.25]
=
×[
+0.25-
]
=
×[1-
]
=
×
=
5 |
9 |
5 |
9 |
5 |
9 |
5 |
9 |
=2
5 |
9 |
=2
5 |
9 |
=2
5 |
9 |
═2
5 |
9 |
(2)[3.6-(1.6+
2 |
9 |
7 |
9 |
3 |
7 |
=[(3.6-1.6)-(
2 |
9 |
7 |
9 |
3 |
7 |
=[2-1]×
3 |
7 |
=1×
3 |
7 |
=
3 |
7 |
(3)
8 |
9 |
3 |
4 |
7 |
16 |
=
8 |
9 |
3 |
4 |
7 |
16 |
=
8 |
9 |
3 |
4 |
7 |
16 |
=
8 |
9 |
7 |
16 |
=
8 |
9 |
9 |
16 |
=
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