1楼:匿名用户
5/7-(2/3-2/5)+3/2
=5/7-4/15+3/2
=150/210-56/210+315/210=409/210
=225/210+56/210
=281/210
3/5+4/7-2/5+3/7递等式计算能简算的要简算
2楼:龚成素
分母相同的分组
3/5+4/7—2/5+3/7
=3/5—2/5+4/7+3/7
=1/5+1
=1又1/5
3楼:匿名用户
脱式计算3/5-2/5+(4/7+3/7),
等于1/5+1=1又1/5,
就是这样算的
4楼:匿名用户
原式=4/7+3/7+(3/5-2/5)
=1又1/5.
计算下面各题,能简算的要简算1/2+4/7+3/7 1/10+3/8-2/5 1-(2/3+1/8) 2 7/8-(2/3-1/4) 1/9+(1/6+2/9)+5/6
5楼:紫色学习
1/2+4/7+3/7
=1/2+1
=1又1/2
1/9+(1/6+2/9)+5/6
=(1/9+2/9)+(1/6+5/6)
=1/3+1
=1又1/3
苹果数减去3后是4和6的公倍数。4、6的最小公倍数是24所以苹果数最少是24+3=27(个)
计算下面各题,能简算的要简算1/2+4/7+3/7 1/10+3/8-2/5 1-(2/3+1/8) 7/8-(2/3-1/4) 1/9+(1/6+2/9)+5/6
6楼:新野旁观者
计算下面各题,能简算的要简算
1/2+4/7+3/7
=1/2+(4/7+3/7)
=1/2+1
=1又1/2
1/10+3/8-2/5
=19/40-2/5
=3/40
1-(2/3+1/8)
=1-2/3-1/8
=1/3-1/8
=5/24
7/8-(2/3-1/4)
=7/8+1/4-2/3
=9/8-2/3
=11/24
1/9+(1/6+2/9)+5/6
=(1/9+2/9)+(1/6+5/6)
=1/3+1
=1又1/3
计算下面各题,能简便计算的要简便计算。 3/5+3/4-5/6 8/9+2/7+5/7 15/8-3/4-1/4 = = = = = =
7楼:吃荤的兔子
3/5+3/4-5/6 8/9+2/7+5/7 15/8-3/4-1/4
=36/60+45/60-50/60 =8/9+1 =15/8-1
=31/60 =17/9 =7/8
9/7-1/6+3/7 7/4-12/23-3/4 5-6(3/8+1/6)
= 12/7-1/6 = 1-12/23 =5-(9/4+1)
= 72/42-7/42 =11/23 =7/4
=65/42
能简算的简算:1、6又2/3-(5/7+5又2/3)
8楼:妙酒
您好:6又2/3-(5/7+5又2/3)
=6又2/3-5又2/3-5/7
=1-5/7
=2/7
9又4/12-6又13/27-1又14/27=9又1/3-(6又13/27+1又14/27)=9又1/3-8
=1又1/3
如果本题有什么不明白可以追问,如果满意记得采纳如果有其他问题请采纳本题后另发点击向我求助,答题不易,请谅解,谢谢。
祝学习进步!
能简算的要简算 (3/4-3/5)÷7/10 (2/3+2/9)÷20/21 1-5/14
9楼:
1) =(3/20)*(10/7)=3/142) =(6/9-2/9)*(21/20)=(4/9)*(21/20)=7/15
3) =1-(5/14)*(7/5)=1-1/2=1/24) =(1/4)*(4/5)/(7/6)=(1/5)*(6/7)=6/35
10楼:匿名用户
(3/4-3/5)÷7/10
=(15/20-12/20)x10/7
=3/20 x 10/7
=3/14
(2/3+2/9)÷20/21
=(6/9+2/9)x21/20
=8/9 x 21/20
=2/3 x 7/5
=14/15
1-5/14÷5/7
=1-5/14 x 7/5
=1-1/2
=1/2
1/4÷(2/3+1/2)×4/5
=1/4÷7/6 x 4/5
=6/28 x 4/5
=6/35
3/7+1/2-3/7简便计算5/7-1/6+5/14简便计算7/12-(5/6-5/12)简便计算2/3-1/2-1/18 5
11楼:匿名用户
3/7+1/2-3/7简便计算
=(3/7-3/7)+1/2
=1/2;
5/7-1/6+5/14简便计算7
=(10/14+5/14)-1/6
=15/14-1/6
=90/84-14/84
=76/84;
=19/21;
7/12-(5/6-5/12)简便计算
=(7/12+5/12)-5/6
=1-5/6
=1/6;
2/3-1/2-1/18
=12/18-9/18-1/18
=2/18
=1/9;
2x-1/8=7/8
2x=1;
x=1/2;
x-1/9-8/9=2 解方程
x-1=2;
x=3;
您好,很高兴为您解答,skyhunter002为您答疑解惑如果本题有什么不明白可以追问,如果满意记得采纳如果有其他问题请采纳本题后另发点击向我求助,答题不易,请谅解,谢谢。
祝学习进步
12楼:净坛使者
3/7 + 1/2 - 3/7
= 3/7 - 3/7 + 1/2
= 1/2
5/7 - 1/6 + 5/14
= 10/14 + 5/14 - 1/6
= 1 + 1/14 - 1 + 5/6
= 3/42 + 35/42
= 38/42
= 19/21
7/12 - ( 5/6 - 5/12 )= 7/12 - 5/6 + 5/12
= 1 - 5/6
= 1/6
2/3 - 1/2 - 1/18
= 12/18 - 9/18 - 1/18= 2/18
= 1/9
2x - 1/8 = 7/8
2x = 7/8 + 1/8
2x = 1
x = 1/2
x - 1/9 - 8/9 = 2
x - 1 = 2
x = 2 + 1
x = 3
13楼:匿名用户
真是闲的蛋疼,这题就是写出来消磨时间的!
1、计算下面各题。(能简算的要简算)15×(3/2+5/3) 〖6/5-(8/1+12/5)〗×7/3
14楼:乐为人师
15×(2/3+3/5)
= 15×2/3+15×3/5
=10+9
=19〖5/6-(1/8+5/12)〗×3/7=[5/6-13/24]×3/7
=7/24×3/7
=1/8
脱式计算:能简算的要简算。,脱式计算:一、能简算的要简算。③4/7×5/9+3/7×5/9 = = = =
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