早教吧作业答案频道 -->其他-->
计算题(1)-8+12-(-16)-|-23|(2)(−2.25)+(−5.1)+14+(−418)+(−910)(3)42×(−23)−(−34)÷(−0.25)(4)(134−78−712)÷(−78)+(−83)(5)412×[−32×(−13)2−0.8]÷(−514).
题目详情
计算题
(1)-8+12-(-16)-|-23|
(2)(−2.25)+(−5.1)+
+(−4
)+(−
)
(3)42×(−
)−(−
)÷(−0.25)
(4)(1
−
−
)÷(−
)+(−
)
(5)4
×[−32×(−
)2−0.8]÷(−5
).
(1)-8+12-(-16)-|-23|
(2)(−2.25)+(−5.1)+
1 |
4 |
1 |
8 |
9 |
10 |
(3)42×(−
2 |
3 |
3 |
4 |
(4)(1
3 |
4 |
7 |
8 |
7 |
12 |
7 |
8 |
8 |
3 |
(5)4
1 |
2 |
1 |
3 |
1 |
4 |
▼优质解答
答案和解析
(1)原式=-8+12+16-32
=4+16-32
=20-32
=-12;
(2)原式=(-2.25+
)+(-5.1-
)+(-4
)
=-2-6-4
=-8-4
=-12
;
(3)原式=-28-
×4
=-28-3
=-31;
(4)原式=(
-
-
)×(-
)+(-
)
=
×(-
)-
×(-
)-
×(-
)-
=-2+1+(
-
)
=-1-2
=-3;
(5)原式=
×[-9×
-0.8]÷(-
)
=
×(-
)×(-
)
=-
×(-
)
=
.
=4+16-32
=20-32
=-12;
(2)原式=(-2.25+
1 |
4 |
9 |
10 |
1 |
8 |
=-2-6-4
1 |
8 |
=-8-4
1 |
8 |
=-12
1 |
8 |
(3)原式=-28-
3 |
4 |
=-28-3
=-31;
(4)原式=(
7 |
4 |
7 |
8 |
7 |
12 |
8 |
7 |
8 |
3 |
=
7 |
4 |
8 |
7 |
7 |
8 |
8 |
7 |
7 |
12 |
8 |
7 |
8 |
3 |
=-2+1+(
2 |
3 |
8 |
3 |
=-1-2
=-3;
(5)原式=
9 |
2 |
1 |
9 |
21 |
4 |
=
9 |
2 |
9 |
5 |
4 |
21 |
=-
81 |
10 |
4 |
21 |
=
54 |
35 |
看了 计算题(1)-8+12-(-...的网友还看了以下:
观察下列各式:1+2+3=6=3×2,2+3+4=9=3×3,3+4+5=12=3×4,4+4+6= 2020-03-31 …
1/1,-1/2,-2/1,1/3,2/2,1/3,-1/4,-2/3,-3/2,-4/1,1/5 2020-04-09 …
1/1=11/2+2/2+1/2=21/3+2/3+3/3+2/3+1/3=31/4+2/4+3/ 2020-06-02 …
在空间直角坐标系下,点A(2,3,-4)关于xoy面、O(0,0,0)、x轴的对称点分别为A:(2 2020-06-03 …
巧算分数的和,会的同学帮忙,1.1/2*3*4+1/3*4*5+...+1/18*19*202.1 2020-06-16 …
观察各式3*1=3,3*3=9,3*3*3=27,3*3*3*3=81...观察各式3*1=3,3 2020-07-19 …
Tn=3×3+5×3^2+7×3^3+.+(2n-1)×3^n-1+(2n+1)×3^n(3^2表 2020-07-29 …
虚数化简1/4*(-4+4*i*3^(1/2))^(1/3)+1/(-4+4*i*3^(1/2)) 2020-07-30 …
(1)10y+7=22y-5-3y(2)3.5x-5=0.5x+10-2x(3)7x-2(4-x)= 2020-10-31 …
求助JS二维数组从N个项取M个进行排列的组合算法函数如数组:arr1=[[1,2,3],[3,6], 2020-11-18 …