早教吧作业答案频道 -->其他-->
计算:(要求写出计算过程)(1)137×(13113−1911)×0.7×2835(2)114×3.9×2.1÷(312×212×39100)(3)(3.875×25.7+378×7415+618×99.9)÷12(4)1013÷2622−125×1113÷7.
题目详情
计算:(要求写出计算过程)
(1)1
×(13
−1
)×0.7×28
(2)1
×3.9×2.1÷(3
×2
×
)
(3)(3.875×25.7+3
×74
+6
×99.9)÷
(4)
÷2
−1
×
÷7.
(1)1
3 |
7 |
1 |
13 |
9 |
11 |
3 |
5 |
(2)1
1 |
4 |
1 |
2 |
1 |
2 |
39 |
100 |
(3)(3.875×25.7+3
7 |
8 |
1 |
5 |
1 |
8 |
1 |
2 |
(4)
10 |
13 |
6 |
22 |
2 |
5 |
11 |
13 |
▼优质解答
答案和解析
(1)1
×(13
−1
)×0.7×28
,
=
×(
-
)×
×
,
=(
×
)×(
-
)×
,
=(
-
)×
,
=
×
-
×
,
=374-52,
=322;
(2)1
×3.9×2.1÷(3
×2
×
),
=1.25×3.9×2.1÷(3.5×2.5×0.39),
=1.25×3.9×2.1÷3.5÷2.5÷0.39,
=(1.25÷2.5)×(3.9÷0.39)×(2.1÷3.5),
=0.5×10×0.6,
=5×0.6,
=3;
(3)(3.875×25.7+3
×74
+6
×99.9)÷
,
=(3.875×25.7+3.875×74.2+6.125×99.9)×2,
=[3.875×(25.7+74.2)+6.125×99.9]×2,
=[3.875×99.9+6.125×99.9]×2,
=(3.875+6.125)×99.9×2,
=10×99.9×2,
=999×2,
=1998;
(4)
÷2
−1
×
÷7,
=
(1)1
3 |
7 |
1 |
13 |
9 |
11 |
3 |
5 |
=
10 |
7 |
168 |
13 |
20 |
11 |
7 |
10 |
143 |
5 |
=(
10 |
7 |
7 |
10 |
168 |
13 |
20 |
11 |
143 |
5 |
=(
170 |
13 |
20 |
11 |
143 |
5 |
=
170 |
13 |
143 |
5 |
20 |
11 |
143 |
5 |
=374-52,
=322;
(2)1
1 |
4 |
1 |
2 |
1 |
2 |
39 |
100 |
=1.25×3.9×2.1÷(3.5×2.5×0.39),
=1.25×3.9×2.1÷3.5÷2.5÷0.39,
=(1.25÷2.5)×(3.9÷0.39)×(2.1÷3.5),
=0.5×10×0.6,
=5×0.6,
=3;
(3)(3.875×25.7+3
7 |
8 |
1 |
5 |
1 |
8 |
1 |
2 |
=(3.875×25.7+3.875×74.2+6.125×99.9)×2,
=[3.875×(25.7+74.2)+6.125×99.9]×2,
=[3.875×99.9+6.125×99.9]×2,
=(3.875+6.125)×99.9×2,
=10×99.9×2,
=999×2,
=1998;
(4)
10 |
13 |
6 |
22 |
2 |
5 |
11 |
13 |
=
看了 计算:(要求写出计算过程)(...的网友还看了以下:
A=(1+1/2)(1-1/2)(1+1/3)(1-1/3)(1+1/4)(1-1/4)……(1+ 2020-05-14 …
1/2*101/100=101/200这一步是因为什么这么做的?原题是1-1/2^2)(1-1/3 2020-05-14 …
matlab数据拟合函数x=[1:62]y=[ 1 1 1 1 1 1 1 1 1 1 1 1 1 2020-05-16 …
matlab 矩阵内的元素判断问题我想设计一个矩阵来得知每列为0的栏位如下id A B C D E 2020-05-16 …
有一个高为1.1米的正方体水池刚好能装满28桶水,已知水桶是一个圆柱体,...有一个高为1.1米的 2020-05-20 …
一、我们知道1/1×2=1/1-1/2=1/2,1/2×3=1/2-1/3=1/6验证:1/3×4 2020-07-17 …
直角三角形1:1:根号2请问各路高手:直角三角形三个角分别为30°60°90°我想问的是:1:1: 2020-07-22 …
寻找规律解数学题1/1*2=1-1/22/2*3=1/2-1/31/3*4=1/3-1/4……计算 2020-07-22 …
由下列各式:1>1/2,1+1/2+1/3>1有下列各式:1>1/2;1+1/2+1/3>1;1+1 2020-10-30 …
计算一道数学题,(1+1/2)×(1+1/3)×(1+1/4)×(1+1/5)×(1+1/6)×(1 2020-11-30 …