1楼:匿名用户
1. 3/4-3/4÷3+9/25
=3/4-3/4×
1/3+9/25
= 3/4-1/4 +9/25
=1/2+9/25
=25/50+18/50
=43/50
2. 2/3÷1/2-5/3×2/5
= 2/3×2-2/3
= 2/3×(版
权2-1)
= 2/3
3. 2÷[(1+2/5)×3/7]
= 2÷(7/5×3/7)
= 2÷3/5
= 2×5/3
=10/3
4. 5/8×3/4+1/4×5/8+5/8= 5/8 ×(3/4+ 1/4+1)
= 5/8 ×2
=5/4
2-15/16÷5/7÷3/4 9/20÷[1/2×(2/5+4/5)] x-5/8x=1
2楼:咨询霍老师
2-15/16÷
5/7÷3/4
=2- 21/ 16 ÷3/4
=2- 7/4
=1/4 =0.25
9/20÷[1/2×(2/5+4/5)]
=9/20/[1/2×6/5]
=9/20×5/3
=3/4
x-5/8x=1/3×45
x-5/8x=15
3/8x=15
x=15÷8/3
x= 40
1/2x-1/3x+3/5x+2/5=5
1/6x +3/5x+2/5=5
23/30x+2/5=5
23/30x=5-2/5
23/30x=23/5
x=23/5 ÷23/30
x=60.8:4=x:8
0.8 ÷4=x ÷8
0.2=x ÷8
x=0.2×8
x=1.6
3楼:兖矿兴隆矿
2-15/16÷5/7÷3/4
=2-15/16*7/5*4/3
=2-7/4
=1/4
9/20÷[1/2×(2/5+4/5)]
=9/20/[1/2*6/5]
=9/20*5/3
=3/4
x-5/8x=1/3×45
3x/5=15
x=25
1/2x-1/3x+3/5x+2/5=5
(1/2-1/3+3/5)x=4.6
23x/30=4.6
x=6.9
0.8:4=x:8
4x=6.4
x=1.6
4楼:紫云千雪
1、2-15/16÷5/7÷3/4
=2-15/16*7/5*4/3
=2-7/4
=8/4-7/4
=1/4
2、9/20÷[1/2×(2/5+4/5)]=9/20/[1/2*6/5]
=9/20/3/5
=9/20*5/3
=3/4
3、x-5/8x=1/3×45
3/8x=15
x=15*8/3
x=40
4、1/2x-1/3x+3/5x+2/5=5(1/2-1/3+3/5)x=5-2/5
23/30x=23/5
x=65、0.8:4=x:8
4x=6.4
x=1.6
脱式计算,4/5÷[8×(1/2-2/5)],[1-(1/4+3/8)]÷1/4?
5楼:匿名用户
4/5÷[8×
(1/2-2/5)]
=4/5÷[8×1/10]
=4/5÷4/5
=1[1-(1/4+3/8)]÷1/4
=[1-5/8]÷1/4
=3/8÷1/4
=3/2
9×13×(5/13+5/9)
=9×13×5/13+9×13×5/9
=45+65
=110
6楼:妙酒
4/5÷[8×(1/2-2/5)]
=4/5÷(8x1/10)
=4/5÷4/5
=1[1-(1/4+3/8)]÷1/4
=(1-5/8)x4
=3/8x4
=3/2
9×13×(5/13+5/9)
=9x13x5/13+9x5/9x13
=9x5+5x13
=5x(9+13)
=5x22
=110
1/6+3/6 5/8-1/8 5/9*3/2 1÷1/5 2-1/4 2/3*9/8 1/2+1/8 2/3÷1/6 9*4/3 1/3÷4/3
7楼:匿名用户
1/6+3/6 =4/6=2/3
5/8-1/8 =4/8=1/2
5/9*3/2 =5/6
1÷1/5 =5
2-1/4 =1又3/4
2/3*9/8 =3/4
1/2+1/8 =5/8
2/3÷1/6 =2/3×
6=49*4/3 =12
1/3÷4/3=1/3×3/4=1/4。
8楼:冷眼看安康
1/6+3/6=2/3
5/8-1/8 =1/2
5/9*3/2 =5/6
1÷1/5=5
2-1/4 =7/4
2/3*9/8=3/4
1/2+1/8=5/8
2/3÷1/6=4
9*4/3=12
1/3÷4/3=1/4
9楼:匿名用户
1/6 3/6=4/6=3/2 5/8-1/8=4/8=1/2 5/9*3/2=5/6 1除以
1/5=5 2-1/4=8/4-1/4=7/4 2/3*9/8=3/4 1/2 1/8=4/8 1/8=5/8 2/3除以1/6=4 9*4/3=12 1/3除以4/3=1/4
(1/3-1/4)÷1/8+5/6 8-5/9-9/1*4 (1/2-1/3+1/6)*24 4/9÷{4/5-(1/5+1/3)} 简便运算
10楼:郭敦顒
郭敦顒回答:
(1/3-1/4)÷1/8+5/6= 8(1/3-1/4)+5/6=16/6-2+5/6=9/6=3/2。
8-5/9-9/1*4 =?此题似应是8-5/9-9/(1*4) =?(网络传送时最易引起误解,产生岐意),
8-5/9-9/(1*4) =8-2-5/9-1/4 =5+3/4-5/9=5+7/36。
(1/2-1/3+1/6)*24 =24/2-24/3+24/6=12-8+4=16。
4/9÷{4/5-(1/5+1/3)}=4/9÷=4/9×15/4=5/3。
11楼:匿名用户
(1/3-1/4)÷1/8+5/6
=(1/3-1/4)×
8+5/6
=1/3×8-1/4×8+5/6
=8/3-2+5/6
=2/3+5/6
=3/2
8-5/9-9/1*4
=8-5/9-4/9
=8-(5/9+4/9)
=8-1
=7(1/2-1/3+1/6)*24
=1/2×24-1/3×24+1/6×24=12-8+4
=84/9÷{4/5-(1/5+1/3)}=4/9÷
=4/9÷
=4/9÷4/15
=4/9×15/4
=5/3
(5/6-3/4)÷(2/3+4/9) (1-1/6×2/5)÷7/9
12楼:新野旁观者
(5/6-3/4)÷(2/3+4/9)
=1/12÷10/9
=3/40
(1-1/6×2/5)÷7/9
=(1-1/15)÷7/9
=14/15÷7/9
=6/5
(5/9+1/13)×9+4/13
=5/9×9+1/13×9+4/13
=5+(9/13+4/13)
=5+1
=65/4-(3/4-1/8)-3/8
=(5/4-3/4)-(3/8-1/8)
=1/2-1/4
=1/4
13楼:kz菜鸟无敌
(5/6-3/4)÷(2/3+4/9)
= (10/12-9/12)÷(6/9+4/9)=1/12÷10/9
=1/12 x 9/10
=3/40
~~~~~~ (1-1/6×2/5)÷7/9=(1-1/15) ÷ 7/9
=14/15 x 9/7
=6/5
~~~~~
(5/9+1/13)×9+4/13
=5/9 x 9 + 1/13 x 9 +4/13=5 + 9/13 + 4/13
=5 + 1
=6~~~~~
5/4-(3/4-1/8)-3/8
=5/4 - ( 6/8 - 1/8 ) - 3/8=5/4 - 5/8 -3/8
=5/4 - 1
=1/4
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