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(2009•东莞模拟)神机妙算:(怎样简便就怎样算)4+16÷45514÷59×64-159×[34-(716-14)]34×0.53+75%×1.4725×3.2×1.2530514÷1514.
题目详情
(2009•东莞模拟)
神机妙算:(怎样简便就怎样算) 4+16÷
|
|
| ||||||||||||||
| 25×3.2×1.25 | 30
|
▼优质解答
答案和解析
(1)4+16÷
,
=4+16×
,
=4+20,
=24;
(2)
÷
×64-1,
=
×
×64-1,
=
-1,
=
;
(3)
×[
-(
-
)],
=
×[
+
-
],
=
×[1-
],
=
×
,
=
;
(4)
×0.53+75%×1.47,
=0.75×0.53+0.75×1.47,
=(0.53+1.47)×0.75,
=2×0.75,
=1.5;
(5)25×3.2×1.25,
=25×0.4×8×1.25,
=10×(8×1.25),
=10×10,
=100;
(6)30
÷
,
=(30+
)×
,
=30×
+
×
,
=28+
4 |
5 |
=4+16×
5 |
4 |
=4+20,
=24;
(2)
5 |
14 |
5 |
9 |
=
5 |
14 |
9 |
5 |
=
288 |
7 |
=
281 |
7 |
(3)
5 |
9 |
3 |
4 |
7 |
16 |
1 |
4 |
=
5 |
9 |
3 |
4 |
1 |
4 |
7 |
16 |
=
5 |
9 |
7 |
16 |
=
5 |
9 |
9 |
16 |
=
5 |
16 |
(4)
3 |
4 |
=0.75×0.53+0.75×1.47,
=(0.53+1.47)×0.75,
=2×0.75,
=1.5;
(5)25×3.2×1.25,
=25×0.4×8×1.25,
=10×(8×1.25),
=10×10,
=100;
(6)30
5 |
14 |
15 |
14 |
=(30+
5 |
14 |
14 |
15 |
=30×
14 |
15 |
5 |
14 |
14 |
15 |
=28+
作业帮用户
2017-10-31
|
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