(3/5+7/8)*40 11/3-5/7*14/15 5/6/(4/7/9/14) (5/8-1/10)*(5/9+1
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(3/5+7/8)*40 11/3-5/7*14/15 5/6/(4/7/9/14) (5/8-1/10)*(5/9+1/3) 1/5/(1-1/2-1/3)
(3/4+1/2)/5/8 14/23*27-9/14/1/27 24*(3/4-7/12) (2/3-4/9*3/8)/7/16 20/5/9+3/8*4
谢谢你 拜托了 万分感谢啊
![](http://img.wesiedu.com/upload/a/9c/a9c4c3f936c9333df6ee9baee3679d97.jpg)
(3/4+1/2)/5/8 14/23*27-9/14/1/27 24*(3/4-7/12) (2/3-4/9*3/8)/7/16 20/5/9+3/8*4
谢谢你 拜托了 万分感谢啊
![](http://img.wesiedu.com/upload/a/9c/a9c4c3f936c9333df6ee9baee3679d97.jpg)
![(3/5+7/8)*40 11/3-5/7*14/15 5/6/(4/7/9/14) (5/8-1/10)*(5/9+1](/uploads/image/z/3946057-25-7.jpg?t=%EF%BC%883%2F5%2B7%2F8%EF%BC%89%2A40+11%2F3-5%2F7%2A14%2F15+5%2F6%2F%EF%BC%884%2F7%2F9%2F14%EF%BC%89+%EF%BC%885%2F8-1%2F10%EF%BC%89%2A%EF%BC%885%2F9%2B1)
(3/5+7/8)x40
=3/5x40+7/8x40
=24+35
=59
11/3-5/7x14/15
=11/3-2/3
=3
5/6÷(4/7÷9/14)
=5/6÷(4/7x14/9)
=5/6÷8/9
=5/6x9/8
=15/16
(5/8-1/10)x(5/9+1/3)
=21/40x8/9
=7/15
1/5÷(1-1/2-1/3)
=1/5÷1/6
=6/5
(3/4+1/2)÷5/8
=5/4x8/5
=2
23/14x27-9/14÷1/27
=27x(23/14-9/14)
=27x1
=27
24x(3/4-7/12)
=24x3/4-24x7/12
=18-14
=4
(2/3-4/9x3/8)÷7/16
=(2/3-1/6)x16/7
=1/2x16/7
=8/7
20÷5/9+3/8x4
=20x9/5+3/2
=36+3/2
=75/2
=3/5x40+7/8x40
=24+35
=59
11/3-5/7x14/15
=11/3-2/3
=3
5/6÷(4/7÷9/14)
=5/6÷(4/7x14/9)
=5/6÷8/9
=5/6x9/8
=15/16
(5/8-1/10)x(5/9+1/3)
=21/40x8/9
=7/15
1/5÷(1-1/2-1/3)
=1/5÷1/6
=6/5
(3/4+1/2)÷5/8
=5/4x8/5
=2
23/14x27-9/14÷1/27
=27x(23/14-9/14)
=27x1
=27
24x(3/4-7/12)
=24x3/4-24x7/12
=18-14
=4
(2/3-4/9x3/8)÷7/16
=(2/3-1/6)x16/7
=1/2x16/7
=8/7
20÷5/9+3/8x4
=20x9/5+3/2
=36+3/2
=75/2
(3/5+7/8)*40 11/3-5/7*14/15 5/6/(4/7/9/14) (5/8-1/10)*(5/9+1
找规律(8,1),(6,14),(11,9),(□,15).7,5,14,4,21,3,( ),( ).
不难,计算(1)2+(-3)+(-4)+5+6+(-7)+(-8)+9+10+(-11+)+(-12)+13+14+15
5/8+5/6=( ) 1/7+3/14=( ) 11/18-5/12= 4/9+11/21= 10/11-4/7
4/5+[7/8-4/5] 7/10-[2/15+1/6] 1-1/3-1/7 5/6+11/14 5/6-[4/9-1
-14-(-10)-8/(-9/7)+3*(-1)3-(-4)*5 等于多少?
将从1开始的自然数分组如下:(1),(2,3,4),(5,6,7,8,9),(10,11,12,13,14,15,16)
将从1开始的自然数分组如下:(1)、(2、3、4)、(5、6、7、8、9)、(10、11、12、13、14、15、16)
计算:(1)1+2+3+4+5+6+7+8+9+10+11+12;(2)11+12+13+14+15+16+17+18+
正整数按下列方法分组:(1),(2,3,4),(5,6,7,8,9)(10,11,12,13,14,15,16),.
(14/5+4/1-7/5)*28 4-4*8/3-8/1 30*(15/4+5/3+10/7) (12/5+4/3-6
1/3×(15+3/14) 42×(19/14-8/21) 1/5×1/10×75×7/15 9/10×4+2/5 简便