(2/3-1/5)+(2/3-12/17)-(1/5+5/17)用简便方法计算
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(2/3-1/5)+(2/3-12/17)-(1/5+5/17)用简便方法计算
(2/3-1/5)+(2/3-12/17)-(1/5+5/17)用简便方法计算
(2/3-1/5)+(2/3-12/17)-(1/5+5/17)用简便方法计算
=(2/3+2/3)-(1/5+1/5)-(12/17+5/17)
=4/3-2/5-1
=-1/15
1+2/3*5+3/5*8+4/8*12+5/12*17+1/17
1+2/3*5+3/5*8+4/8*12+5/12*17+1/17
(2/3-1/5)+(2/3-12/17)-(1/5+5/17)用简便方法计算
(2/3+1/5)+(2/3-12/17)-(1/5+5/17)怎么简算
简算 (2+3+1/5)+(2/3-5/17)-(1/5+12/7)
2,3,5,( ),12,17,( )找规律
12^2*3^(-17)*8^5*(3/2)^15
(33/2+1/5)+(2/3-12/17)-(1/5+5/17) (简便计算)
(-3/17)×12又1/2 ×(-5又2/3 )×(-0.08)=简便计算
(1/2×3)+(2/3×5)+(3/5×8)+(4/8×12)+(5/12×17)+(6/17×23)+(7/23×30)=?
找规律:[1]1 1 2 3 5 8 [ ] [ ] [2]2 3 5 8 12 17 [ ] [ ] [3 ]1 2 2 4 3 6 [ ] [ ]
1+4/17*(2+2/3-3/4)+17+11/12*21/17
0.68-1/8-3/8= 12/17+( 5/47+3/20)= 2、找规律填数 1,2/3,5/3,4/3,2,3( ) ( )
2.15-(5/6-1/12) 5/17-4/51+2/3是2.15
1又17分之5*(18又3分之2-4分之3)+17又12分之11/12分之17 简便
{2.74-0.56*(2又5/12-1又19/60+2.275)}/1又3/17
找规律填数:1/1,3/2,7/5,17/12,41/29,( )
(3分之2加5分之1)加(3分之2减17分之12)减(5分之1加17分之5)简便