早教吧作业答案频道 -->其他-->
计算.(能简算的要用简便方法计算)①25×13×25×310;②79÷115+29×511;③18×58+0.125×41+12.5%;④45÷[58×(1-15)].
题目详情
计算.(能简算的要用简便方法计算)
①25×
×
×
;
②
÷
+
×
;
③
×58+0.125×41+12.5%;
④
÷[
×( 1-
)].
①25×
1 |
3 |
2 |
5 |
3 |
10 |
②
7 |
9 |
11 |
5 |
2 |
9 |
5 |
11 |
③
1 |
8 |
④
4 |
5 |
5 |
8 |
1 |
5 |
▼优质解答
答案和解析
(1)25×
×
×
=(25×
)×(
×
)
=10×
=1;
(2)
÷
+
×
=(
+
)×
=1×
=
;
(3)
×58+0.125×41+12.5%
=
×(58+41+1)
=
×100
=12.5;
(4)
÷[
×(1-
)]
=
÷[
×
]
=
÷
=1
.
1 |
3 |
2 |
5 |
3 |
10 |
=(25×
2 |
5 |
1 |
3 |
3 |
10 |
=10×
1 |
10 |
=1;
(2)
7 |
9 |
11 |
5 |
2 |
9 |
5 |
11 |
=(
7 |
9 |
2 |
9 |
5 |
11 |
=1×
5 |
11 |
=
5 |
11 |
(3)
1 |
8 |
=
1 |
8 |
=
1 |
8 |
=12.5;
(4)
4 |
5 |
5 |
8 |
1 |
5 |
=
4 |
5 |
5 |
8 |
4 |
5 |
=
4 |
5 |
1 |
2 |
=1
3 |
5 |
看了 计算.(能简算的要用简便方法...的网友还看了以下:
6、3.125×(1.6+12/5)÷(5/2-0.625)7/5×1/7×6/13+5/7×1/ 2020-04-07 …
(3+5/7-2/3)×(1/5+1/7+1/13)-(1/5-1/7+1/13)×3+(1/5+ 2020-04-27 …
计算[3-2×(√7-1)]-5×(√5-3)(精确到百分位)…………要算式 2020-05-21 …
某市对50户居民的家庭存款额进行了调查,数据如下(单位:万元)如下1.6,3.5,2.3,6.5, 2020-06-07 …
哥哥姐姐帮帮我,我给你们20,回答的快在加,信誉!直接写得数.1/7+5/7=1/4+1/3=4/ 2020-07-03 …
17.68/5.2+2.7*1.5 2020-07-17 …
怎样简便怎样算(2/7+1/5)x7x5 2020-10-31 …
一道关于数字的题*6**2**3***1**5**47**8**2****7**1**5*2**3* 2020-11-02 …
简便运算2.7×1.5-2.7 2020-11-26 …
计算.4÷8/3-1/2=1/5+2/7÷5/7=8÷2/3+4=25÷(1-1/6)=18÷(1+ 2020-12-26 …