(5/18-(7/12-2/5))×15/14 15/16+(7/16-1/4)÷1/2 4/(5/18-(7/12-2/5))×15/1415/16+(7/16-1/4)÷1/24/17×(125×34)
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(5/18-(7/12-2/5))×15/14 15/16+(7/16-1/4)÷1/2 4/(5/18-(7/12-2/5))×15/1415/16+(7/16-1/4)÷1/24/17×(125×34)
(5/18-(7/12-2/5))×15/14 15/16+(7/16-1/4)÷1/2 4/
(5/18-(7/12-2/5))×15/14
15/16+(7/16-1/4)÷1/2
4/17×(125×34)
(5/18-(7/12-2/5))×15/14 15/16+(7/16-1/4)÷1/2 4/(5/18-(7/12-2/5))×15/1415/16+(7/16-1/4)÷1/24/17×(125×34)
41/504,21/16,1000
2/5+1/4+3/8 11/9-2/7-5/7 11/25+(1/12+14/25) 15/18-(15/18-11/12) 简算,急2/5+1/4+3/8 11/9-2/7-5/7 11/25+(1/12+14/25)15/18-(15/18-11/12)
(3/4+5/6)×12 7/9×5/7+7/9×2/5 15/17×18 3/7-6/13×3/7
5.55÷(18/5-7/2×12%)
(5/18-(7/12-2/5))×15/14 15/16+(7/16-1/4)÷1/2 4/(5/18-(7/12-2/5))×15/1415/16+(7/16-1/4)÷1/24/17×(125×34)
6/5 2 7/9 50/30 4 3/7 12/15 5 6/13 15/15 1/4 12/9 23/2141/36 2 18/43 真分数 ,假分数 .2 7/9(读作 2又9分之7)
使用简便方法计算(1)3-7/12 (2)5/7×3/8 + 5/8×7/5 (3)8/15 × 5/16+27/ ÷10/9 (4)18×(9/4 + 6/5) (5)3/2×7+ 3/2×5 (6)( 1/6-1/12 )×24-5/4
按规律填空.(1)12,5,10,10,8,15,( ),( ).(2)18,8,12,7,6,6,( ),( ).
一题:12,5,10,10,8,15,(),() 二题:18,8,12,7,6,6,(),()
1/3,1/2,5/9,7/12,3/15,11/18问从左到右第2006个分数是( )
5/8+5/6=( ) 1/7+3/14=( ) 11/18-5/12= 4/9+11/21= 10/11-4/78/9-5/12 2/7+4/5 17/30-4/15帮帮忙
7/12() 2/19()3/23 50/60()15/18 3/4()4/5 (填大于或小于)
求:-4.2+5.7-8.4+10 -1/4+5/6+2/3-1/2 12-(-18)+(-7)-15 4.7-(-8.9)-7.5+(-6)的简便算法!
-7-(+7)-(-15)-1=? 0-1+2-3+4-5=? -3-4+19-11+2=? 10-24-15+26-42+18=?全都需要过程(-52)+(-19)-(+37)-(-24)=?过程 -9+(+5分之4)-(-12)+(-5)+(-5分之4)=?过程 (-3分之1)+(+5分之2)+(+5
【-7/18-5/12+6-(-2/9)】/(5/36)
1/2,5/9,7/12,3/5,11/18,( ),( )
-9*(-11)-12*(-8) (1/3-5/7-2/5)*10536*(-19 17/18) -5*7 1/3 +12*(-7 1/3)
12乘(12分之5+15分之7)*15
-4.2+5.7+(-8.4)+10 6.1-3.7-4.9+1.8 12+(-18)+(-7)+15 -40+28+(-19)+(-24)+(-32) (+12)+(-18)+(-7)+(+15) (-40)+(+28)+(-19)+(-24)+(32) (+4.7)+(-8.9)+(+7.5)+(-6) 2/1+(-3/2)+4/5+(-2/1)+(-3