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4/5+2/3÷(5/6-1/2)等于多少?要过程

4/5+2/3÷(5/6-1/2) =4/5+2/3÷(5/6-3/6) =4/5+2/3÷1/3 =4/5+2 =2又4/5

如图

[4-(5/8-1/2)]÷2/3 =(4-1/8)÷2/3 =31/8÷2/3 =93/16 5/6×3/4+5/6÷4 =5/6x3/4+5/6x1/4 =5/6x(3/4+1/4) =5/6x1 =5/6

解:根据比例的基本性质解比例: 2/5:(1+X)=4/5:6 4/5(1+x)=2/5*6 1+x=12/5÷4/5 1+x=3 x=3-1 x=2

7/8+2/3÷(4/5)+1/6 =7/8+5/6+1/6 =7/8+1 =1又7/8

(5-5)+5÷5=0+1=1; 5÷5+5÷5=1+1=2; 5-(5+5)÷5=5-10÷5=5-2=3; 5-5的(5-5)次方=5-5的0次方=5-1=4; 5+(5-5)x5=5+0x5=5+0=5; 5+5的(5-5)次方=5+5的0次方=5+1=6; 5+(5+5)÷5=5+10÷5=5+2=7; 5!/(5+5+5)=8(这一个,并不是单纯的数字...

3/4÷(6/5-1/2)+3/4 =3/4÷7/12+3/4 =3/4×7/12+3/4 =3/4×(7/12+1) =3/4×19/12 =19/16。

5/8*1/2*4/5=1/4 2/3÷4/9*3/10 =2/3x9/4x3/10 =9/20 5/6*4/5÷1/2 =5/6x4/5x2 =4/3 (3/4-5/12)*24 = 3/4x24-5/12x24 =18-10 =8 (1/2+1/6)÷1/12 =1/2x12+1/6x12 =6+2 =8

4 2/5+[2.6+3/4-(0.65+1 3/4)]÷2 3/4 =4.4+[2.6+0.75-(0.65+1.75)]/2.75 =4.4+0.95/2.75 =4 41/55

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