早教吧作业答案频道 -->数学-->
用简便方法计算:(1)−1.53×0.75+1.53×12+45×1.53(2)(213−312+1912)÷(−116).
题目详情
用简便方法计算:
(1)−1.53×0.75+1.53×
+
×1.53
(2)(2
−3
+1
)÷(−1
).
(1)−1.53×0.75+1.53×
1 |
2 |
4 |
5 |
(2)(2
1 |
3 |
1 |
2 |
9 |
12 |
1 |
6 |
▼优质解答
答案和解析
(1)-1.53×0.75+1.53×
+
×1.53,
=1.53×(-0.75+0.5+0.8),
=1.53×(1.3-0.75),
=1.53×0.55,
=0.8415;
(2)(2
-3
+1
)÷(-1
),
=(
-
+
)×(-
),
=
×(-
)-
×(-
)+
×(-
),
=-2+3-
,
=3-3
,
=-
.
1 |
2 |
4 |
5 |
=1.53×(-0.75+0.5+0.8),
=1.53×(1.3-0.75),
=1.53×0.55,
=0.8415;
(2)(2
1 |
3 |
1 |
2 |
9 |
12 |
1 |
6 |
=(
7 |
3 |
7 |
2 |
21 |
12 |
6 |
7 |
=
7 |
3 |
6 |
7 |
7 |
2 |
6 |
7 |
21 |
12 |
6 |
7 |
=-2+3-
3 |
2 |
=3-3
1 |
2 |
=-
1 |
2 |
看了 用简便方法计算:(1)−1....的网友还看了以下:
关于一道数学题化简|2x+1|-|x-5|设2x+1=0,x-5=0x=-1/2,x=5当x<-1 2020-05-17 …
数学计算正确and过程SD~!可只能选做,但是后5题必做-1/4+(-2)^2-(-3)^2+(- 2020-06-04 …
在5.91、5..9、5.9.1.2、5.91212、5.18276…这几个数中,有限小数是,无限 2020-06-27 …
0.39+1/5+39/100+4/5=1/2-(5/6-3/8)=8/19-6/19+1/107 2020-07-17 …
1、2/3÷1/2-1/4×2/52、2-6/13÷9/26-2/33、2/9+1/2÷4/5+3 2020-07-18 …
这些题有简便算法吗?﹙5/18÷1/3+5/18﹚×0.25﹙6+3/5﹚×5/611/16+8/ 2020-07-19 …
(3+根号5)再开根号,减去(3-根号5)再开根号以上式作为真数,底数为2,即log2[(3+5^ 2020-07-30 …
设非空集合A{1,2,3,4,5,6,7},且当a∈A时必有8-a∈A,这样的A共有(15)个.{ 2020-08-01 …
大家忙我做10道方程题,10y+2(7y-2)=5(4y+3)+3y3/4[4/3*(1/2x-1/ 2020-10-31 …
设非空集合A{1,2,3,4,5,6,7},且当a∈A时必有8-a∈A,这样的A共有(15)个.{4 2020-12-07 …