早教吧作业答案频道 -->其他-->
计算(1)(-513)×(+178)×(-215);(2)36×(23−59+712);(3)用简便方法计算25×(12)2-(-25)×(15)+25×34;
题目详情
计算(1)(-5
)×(+1
)×(-2
);
(2)36×(
−
+
);
(3)用简便方法计算25×(
)2-(-25)×(
)+25×
;
)×(+1
)×(-2
);
(2)36×(
−
+
);
(3)用简便方法计算25×(
)2-(-25)×(
)+25×
;
1 1 3 3
)×(-2
);
(2)36×(
−
+
);
(3)用简便方法计算25×(
)2-(-25)×(
)+25×
;
7 7 8 8
);
(2)36×(
−
+
);
(3)用简便方法计算25×(
)2-(-25)×(
)+25×
;
1 1 5 5
−
+
);
(3)用简便方法计算25×(
)2-(-25)×(
)+25×
;
2 2 3 3
5 5 9 9
7 7 12 12
)2-(-25)×(
)+25×
;
1 1 2 2 2
)+25×
;
1 1 5 5
;
3 3 4 4
1 |
3 |
7 |
8 |
1 |
5 |
(2)36×(
2 |
3 |
5 |
9 |
7 |
12 |
(3)用简便方法计算25×(
1 |
2 |
1 |
5 |
3 |
4 |
1 |
3 |
7 |
8 |
1 |
5 |
(2)36×(
2 |
3 |
5 |
9 |
7 |
12 |
(3)用简便方法计算25×(
1 |
2 |
1 |
5 |
3 |
4 |
1 |
3 |
7 |
8 |
1 |
5 |
(2)36×(
2 |
3 |
5 |
9 |
7 |
12 |
(3)用简便方法计算25×(
1 |
2 |
1 |
5 |
3 |
4 |
7 |
8 |
1 |
5 |
(2)36×(
2 |
3 |
5 |
9 |
7 |
12 |
(3)用简便方法计算25×(
1 |
2 |
1 |
5 |
3 |
4 |
1 |
5 |
2 |
3 |
5 |
9 |
7 |
12 |
(3)用简便方法计算25×(
1 |
2 |
1 |
5 |
3 |
4 |
2 |
3 |
5 |
9 |
7 |
12 |
1 |
2 |
1 |
5 |
3 |
4 |
1 |
2 |
1 |
5 |
3 |
4 |
1 |
5 |
3 |
4 |
3 |
4 |
▼优质解答
答案和解析
(1)(-5
)×(+1
)×(-2
)
=
×
×
=22;
(2)36×(
−
+
)
=36×
-36×
+36×
=24-20+21
=25;
(3)原式=25×
+25×
+25×
=25×(
+
+
)
=30.
1 1 13 3 3)×(+1
)×(-2
)
=
×
×
=22;
(2)36×(
−
+
)
=36×
-36×
+36×
=24-20+21
=25;
(3)原式=25×
+25×
+25×
=25×(
+
+
)
=30.
7 7 78 8 8)×(-2
)
=
×
×
=22;
(2)36×(
−
+
)
=36×
-36×
+36×
=24-20+21
=25;
(3)原式=25×
+25×
+25×
=25×(
+
+
)
=30.
1 1 15 5 5)
=
×
×
=22;
(2)36×(
−
+
)
=36×
-36×
+36×
=24-20+21
=25;
(3)原式=25×
+25×
+25×
=25×(
+
+
)
=30.
16 16 163 3 3×
15 15 158 8 8×
11 11 115 5 5
=22;
(2)36×(
−
+
)
=36×
-36×
+36×
=24-20+21
=25;
(3)原式=25×
+25×
+25×
=25×(
+
+
)
=30.
2 2 23 3 3−
5 5 59 9 9+
7 7 712 12 12)
=36×
-36×
+36×
=24-20+21
=25;
(3)原式=25×
+25×
+25×
=25×(
+
+
)
=30.
2 2 23 3 3-36×
+36×
=24-20+21
=25;
(3)原式=25×
+25×
+25×
=25×(
+
+
)
=30.
5 5 59 9 9+36×
=24-20+21
=25;
(3)原式=25×
+25×
+25×
=25×(
+
+
)
=30.
7 7 712 12 12
=24-20+21
=25;
(3)原式=25×
+25×
+25×
=25×(
+
+
)
=30.
1 1 14 4 4+25×
+25×
=25×(
+
+
)
=30.
1 1 15 5 5+25×
=25×(
+
+
)
=30.
3 3 34 4 4
=25×(
+
+
)
=30.
1 1 14 4 4+
+
)
=30.
1 1 15 5 5+
)
=30.
3 3 34 4 4)
=30.
1 |
3 |
7 |
8 |
1 |
5 |
=
16 |
3 |
15 |
8 |
11 |
5 |
=22;
(2)36×(
2 |
3 |
5 |
9 |
7 |
12 |
=36×
2 |
3 |
5 |
9 |
7 |
12 |
=24-20+21
=25;
(3)原式=25×
1 |
4 |
1 |
5 |
3 |
4 |
=25×(
1 |
4 |
1 |
5 |
3 |
4 |
=30.
1 |
3 |
7 |
8 |
1 |
5 |
=
16 |
3 |
15 |
8 |
11 |
5 |
=22;
(2)36×(
2 |
3 |
5 |
9 |
7 |
12 |
=36×
2 |
3 |
5 |
9 |
7 |
12 |
=24-20+21
=25;
(3)原式=25×
1 |
4 |
1 |
5 |
3 |
4 |
=25×(
1 |
4 |
1 |
5 |
3 |
4 |
=30.
7 |
8 |
1 |
5 |
=
16 |
3 |
15 |
8 |
11 |
5 |
=22;
(2)36×(
2 |
3 |
5 |
9 |
7 |
12 |
=36×
2 |
3 |
5 |
9 |
7 |
12 |
=24-20+21
=25;
(3)原式=25×
1 |
4 |
1 |
5 |
3 |
4 |
=25×(
1 |
4 |
1 |
5 |
3 |
4 |
=30.
1 |
5 |
=
16 |
3 |
15 |
8 |
11 |
5 |
=22;
(2)36×(
2 |
3 |
5 |
9 |
7 |
12 |
=36×
2 |
3 |
5 |
9 |
7 |
12 |
=24-20+21
=25;
(3)原式=25×
1 |
4 |
1 |
5 |
3 |
4 |
=25×(
1 |
4 |
1 |
5 |
3 |
4 |
=30.
16 |
3 |
15 |
8 |
11 |
5 |
=22;
(2)36×(
2 |
3 |
5 |
9 |
7 |
12 |
=36×
2 |
3 |
5 |
9 |
7 |
12 |
=24-20+21
=25;
(3)原式=25×
1 |
4 |
1 |
5 |
3 |
4 |
=25×(
1 |
4 |
1 |
5 |
3 |
4 |
=30.
2 |
3 |
5 |
9 |
7 |
12 |
=36×
2 |
3 |
5 |
9 |
7 |
12 |
=24-20+21
=25;
(3)原式=25×
1 |
4 |
1 |
5 |
3 |
4 |
=25×(
1 |
4 |
1 |
5 |
3 |
4 |
=30.
2 |
3 |
5 |
9 |
7 |
12 |
=24-20+21
=25;
(3)原式=25×
1 |
4 |
1 |
5 |
3 |
4 |
=25×(
1 |
4 |
1 |
5 |
3 |
4 |
=30.
5 |
9 |
7 |
12 |
=24-20+21
=25;
(3)原式=25×
1 |
4 |
1 |
5 |
3 |
4 |
=25×(
1 |
4 |
1 |
5 |
3 |
4 |
=30.
7 |
12 |
=24-20+21
=25;
(3)原式=25×
1 |
4 |
1 |
5 |
3 |
4 |
=25×(
1 |
4 |
1 |
5 |
3 |
4 |
=30.
1 |
4 |
1 |
5 |
3 |
4 |
=25×(
1 |
4 |
1 |
5 |
3 |
4 |
=30.
1 |
5 |
3 |
4 |
=25×(
1 |
4 |
1 |
5 |
3 |
4 |
=30.
3 |
4 |
=25×(
1 |
4 |
1 |
5 |
3 |
4 |
=30.
1 |
4 |
1 |
5 |
3 |
4 |
=30.
1 |
5 |
3 |
4 |
=30.
3 |
4 |
=30.
看了 计算(1)(-513)×(+...的网友还看了以下:
同时抛15枚均匀硬币,出现正面向上为奇数枚的概率为PP=P(1,15)+P(3,15)+.P(15 2020-04-25 …
几道数学计算题,0-(-64)-(+43)+(-49)-(+15)(-2)+3+6+(-3)+2+ 2020-05-16 …
2的平方根15的平方根?15的算术平方根?2的平方根15的平方根?15的算术平方根? 2020-06-13 …
matlab做一组数据的拟合直线,X(mm) 15 15.2 15.4 15.6 15.8 16 2020-06-27 …
简算:15-4/5*2/3-7/15简算:15-4/5*2/3-7/15怎样简算!方法, 2020-07-16 …
8/15+2/3-3/4(/代表分数线)(2/3+2/15)×45(4/5+1/4)除以7/3+7 2020-07-19 …
老师在黑板上写出三个算式:5^2-3^2=8×2,9^2—7^2=8×4,15^2—3^2=8×2 2020-07-22 …
计算题,(15/2+15/4-15/7-15/8)÷(31/2+31/4-31/7-31/8)=?要 2020-11-26 …
阅读下面例题:计算五+15−五−15.解:∵(五+15−五−15)2=五+15−2五+15•五−15 2020-11-28 …
六年级分数速算与巧算有3道题望大虾们能帮帮ME(简算!!急!!)0.375*(7/9+14/51)+ 2020-12-09 …