早教吧作业答案频道 -->数学-->
下面各题,怎样算简便就怎样算.(45+14)÷73+710;813÷7+17×513;20-7.8÷(6.2-4.9)
题目详情
下面各题,怎样算简便就怎样算.
(
+
)÷
+
;
÷7+
×
; 20-7.8÷(6.2-4.9)
+
)÷
+
;
÷7+
×
; 20-7.8÷(6.2-4.9)
4 5 4 4 5 5
)÷
+
;
÷7+
×
; 20-7.8÷(6.2-4.9)
1 4 1 1 4 4
+
;
÷7+
×
; 20-7.8÷(6.2-4.9)
7 3 7 7 3 3
;
÷7+
×
; 20-7.8÷(6.2-4.9)
7 10 7 7 10 10
÷7+
×
; 20-7.8÷(6.2-4.9)
8 13 8 8 13 13
×
; 20-7.8÷(6.2-4.9)
1 7 1 1 7 7
; 20-7.8÷(6.2-4.9)
5 13 5 5 13 13
(
4 |
5 |
1 |
4 |
7 |
3 |
7 |
10 |
8 |
13 |
1 |
7 |
5 |
13 |
4 |
5 |
1 |
4 |
7 |
3 |
7 |
10 |
8 |
13 |
1 |
7 |
5 |
13 |
4 |
5 |
1 |
4 |
7 |
3 |
7 |
10 |
8 |
13 |
1 |
7 |
5 |
13 |
1 |
4 |
7 |
3 |
7 |
10 |
8 |
13 |
1 |
7 |
5 |
13 |
7 |
3 |
7 |
10 |
8 |
13 |
1 |
7 |
5 |
13 |
7 |
10 |
8 |
13 |
1 |
7 |
5 |
13 |
8 |
13 |
1 |
7 |
5 |
13 |
1 |
7 |
5 |
13 |
5 |
13 |
▼优质解答
答案和解析
(1)(
+
)÷
+
=
÷
+
=
+
=
;
(2)
÷7+
×
=
×
+
×
=(
+
)×
=1×
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
4 5 4 4 45 5 5+
)÷
+
=
÷
+
=
+
=
;
(2)
÷7+
×
=
×
+
×
=(
+
)×
=1×
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
1 4 1 1 14 4 4)÷
+
=
÷
+
=
+
=
;
(2)
÷7+
×
=
×
+
×
=(
+
)×
=1×
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
7 3 7 7 73 3 3+
=
÷
+
=
+
=
;
(2)
÷7+
×
=
×
+
×
=(
+
)×
=1×
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
7 10 7 7 710 10 10
=
÷
+
=
+
=
;
(2)
÷7+
×
=
×
+
×
=(
+
)×
=1×
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
21 20 21 21 2120 20 20÷
+
=
+
=
;
(2)
÷7+
×
=
×
+
×
=(
+
)×
=1×
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
7 3 7 7 73 3 3+
=
+
=
;
(2)
÷7+
×
=
×
+
×
=(
+
)×
=1×
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
7 10 7 7 710 10 10
=
+
=
;
(2)
÷7+
×
=
×
+
×
=(
+
)×
=1×
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
9 20 9 9 920 20 20+
=
;
(2)
÷7+
×
=
×
+
×
=(
+
)×
=1×
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
7 10 7 7 710 10 10
=
;
(2)
÷7+
×
=
×
+
×
=(
+
)×
=1×
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
23 20 23 23 2320 20 20;
(2)
÷7+
×
=
×
+
×
=(
+
)×
=1×
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
8 13 8 8 813 13 13÷7+
×
=
×
+
×
=(
+
)×
=1×
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
1 7 1 1 17 7 7×
=
×
+
×
=(
+
)×
=1×
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
5 13 5 5 513 13 13
=
×
+
×
=(
+
)×
=1×
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
8 13 8 8 813 13 13×
+
×
=(
+
)×
=1×
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
1 7 1 1 17 7 7+
×
=(
+
)×
=1×
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
1 7 1 1 17 7 7×
=(
+
)×
=1×
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
5 13 5 5 513 13 13
=(
+
)×
=1×
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
8 13 8 8 813 13 13+
)×
=1×
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
5 13 5 5 513 13 13)×
=1×
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
1 7 1 1 17 7 7
=1×
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
1 7 1 1 17 7 7
=
;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
1 7 1 1 17 7 7;
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
4 |
5 |
1 |
4 |
7 |
3 |
7 |
10 |
=
21 |
20 |
7 |
3 |
7 |
10 |
=
9 |
20 |
7 |
10 |
=
23 |
20 |
(2)
8 |
13 |
1 |
7 |
5 |
13 |
=
8 |
13 |
1 |
7 |
1 |
7 |
5 |
13 |
=(
8 |
13 |
5 |
13 |
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
4 |
5 |
1 |
4 |
7 |
3 |
7 |
10 |
=
21 |
20 |
7 |
3 |
7 |
10 |
=
9 |
20 |
7 |
10 |
=
23 |
20 |
(2)
8 |
13 |
1 |
7 |
5 |
13 |
=
8 |
13 |
1 |
7 |
1 |
7 |
5 |
13 |
=(
8 |
13 |
5 |
13 |
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
1 |
4 |
7 |
3 |
7 |
10 |
=
21 |
20 |
7 |
3 |
7 |
10 |
=
9 |
20 |
7 |
10 |
=
23 |
20 |
(2)
8 |
13 |
1 |
7 |
5 |
13 |
=
8 |
13 |
1 |
7 |
1 |
7 |
5 |
13 |
=(
8 |
13 |
5 |
13 |
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
7 |
3 |
7 |
10 |
=
21 |
20 |
7 |
3 |
7 |
10 |
=
9 |
20 |
7 |
10 |
=
23 |
20 |
(2)
8 |
13 |
1 |
7 |
5 |
13 |
=
8 |
13 |
1 |
7 |
1 |
7 |
5 |
13 |
=(
8 |
13 |
5 |
13 |
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
7 |
10 |
=
21 |
20 |
7 |
3 |
7 |
10 |
=
9 |
20 |
7 |
10 |
=
23 |
20 |
(2)
8 |
13 |
1 |
7 |
5 |
13 |
=
8 |
13 |
1 |
7 |
1 |
7 |
5 |
13 |
=(
8 |
13 |
5 |
13 |
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
21 |
20 |
7 |
3 |
7 |
10 |
=
9 |
20 |
7 |
10 |
=
23 |
20 |
(2)
8 |
13 |
1 |
7 |
5 |
13 |
=
8 |
13 |
1 |
7 |
1 |
7 |
5 |
13 |
=(
8 |
13 |
5 |
13 |
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
7 |
3 |
7 |
10 |
=
9 |
20 |
7 |
10 |
=
23 |
20 |
(2)
8 |
13 |
1 |
7 |
5 |
13 |
=
8 |
13 |
1 |
7 |
1 |
7 |
5 |
13 |
=(
8 |
13 |
5 |
13 |
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
7 |
10 |
=
9 |
20 |
7 |
10 |
=
23 |
20 |
(2)
8 |
13 |
1 |
7 |
5 |
13 |
=
8 |
13 |
1 |
7 |
1 |
7 |
5 |
13 |
=(
8 |
13 |
5 |
13 |
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
9 |
20 |
7 |
10 |
=
23 |
20 |
(2)
8 |
13 |
1 |
7 |
5 |
13 |
=
8 |
13 |
1 |
7 |
1 |
7 |
5 |
13 |
=(
8 |
13 |
5 |
13 |
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
7 |
10 |
=
23 |
20 |
(2)
8 |
13 |
1 |
7 |
5 |
13 |
=
8 |
13 |
1 |
7 |
1 |
7 |
5 |
13 |
=(
8 |
13 |
5 |
13 |
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
23 |
20 |
(2)
8 |
13 |
1 |
7 |
5 |
13 |
=
8 |
13 |
1 |
7 |
1 |
7 |
5 |
13 |
=(
8 |
13 |
5 |
13 |
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
8 |
13 |
1 |
7 |
5 |
13 |
=
8 |
13 |
1 |
7 |
1 |
7 |
5 |
13 |
=(
8 |
13 |
5 |
13 |
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
1 |
7 |
5 |
13 |
=
8 |
13 |
1 |
7 |
1 |
7 |
5 |
13 |
=(
8 |
13 |
5 |
13 |
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
5 |
13 |
=
8 |
13 |
1 |
7 |
1 |
7 |
5 |
13 |
=(
8 |
13 |
5 |
13 |
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
8 |
13 |
1 |
7 |
1 |
7 |
5 |
13 |
=(
8 |
13 |
5 |
13 |
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
1 |
7 |
1 |
7 |
5 |
13 |
=(
8 |
13 |
5 |
13 |
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
1 |
7 |
5 |
13 |
=(
8 |
13 |
5 |
13 |
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
5 |
13 |
=(
8 |
13 |
5 |
13 |
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
8 |
13 |
5 |
13 |
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
5 |
13 |
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
1 |
7 |
=1×
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
1 |
7 |
=
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
1 |
7 |
(3)20-7.8÷(6.2-4.9)
=20-7.8÷1.3
=20-6
=14.
看了 下面各题,怎样算简便就怎样算...的网友还看了以下:
元素的质量比是怎么计算的?比如说,二氧化碳中的碳元素和氧元素的质量之比等于12∶(16X2)=3∶ 2020-05-16 …
元素的质量比怎么计算?比如说,二氧化碳中的碳元素和氧元素的质量之比等于12∶(16X2)=3∶8 2020-05-16 …
请教关于排列组合的算术问题1、C8=什么啊?C(8,3)怎么理解啊,结果是多少,怎么算的啊.不太懂 2020-06-13 …
优惠5个点,也就是5%,0.5折.那0.5折是9.5折.怎么换算呀!求讲的明白点.能让我看懂.同上 2020-06-24 …
3/15除以1/99+5/13能简算吗 64乘5/8+33乘5/8能简算吗如果能简算怎么简算 2020-06-27 …
铁得到几个电子?怎么计算?Fe3O4+4H2=3Fe+4H2O用氢气还原四氧化三铁的反应中,8个氢 2020-07-25 …
正弦定理的小问题42.9cm乘以sin81.8°再除以sin32.0°,请问长度乘以正弦这怎么算, 2020-07-30 …
关于乘法的计算~算乘法必须按部就班吗:比如1.8*1.8必须是1.8*0.8+1.8*1吗那大家如果 2020-10-30 …
百分比公式1200*6.5%=7.8是怎么计算的?6.5%不是等于0.065吗0.065*1200= 2020-11-28 …
有一道题:1+2+3+4+5+6+7+8+9简算怎么算。解法是首尾相加,共4个10和一个5.有有一道 2021-01-12 …