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2/9×0.625÷(10/3)简便运算

10-(25/8)×(8/5+8/3)÷(25/12-5/8) =10-(25/8)×(64/15)÷(35/24) =(210/21)-(192/21) =6/7

-3×10×1又1/3×0.625×(-4/9)×(-8) =[(-3)×1又1/3]×[10×(-4/9)]×[]0.625×(-8)] =(-4)×(-40/9)×(-5) =-800/9

-2×5/8+0.625 =-10/8+5/8 =-5/8

(1)2.64×1.7-2.64×0.7 =2.64×(1.7-0.7) =2.64×1 =2.64 (2)31.5×1.07-3.15×0.7 =3.15×10.7-3.15×0.7 =3.15×(10.7-0.7) =3.15×10 =31.5 (3)2.7×5.7-2.7+5.3×2.7 =2.7×(5.7-1+5.3) =2.7×10 =27 (4)0.625÷0.125×0.8 =(0.625×0.8)×8÷...

5/8×3/10+0.625×0.6+62.5%×0.1 =0.625×0.3+0.625×0.6+0.625×0.1 =0.625×(0.3+0.6+0.1) =0.625×1 =0.625

6.25×0.65+5/8×3.4+5×1/8 =6.25×0.65+0.625×3.4+0.625 =0.625×6.5+0.625×3.4+0.625 =0.625×(6.5+3.4+1) =6.25

99×0.625+99×0.625+102 =99×(0.625×2)+102 =99×1.25+102 =(100-1)×1.25+102 =125-1.25+102 =123.75+102 =225.75

x+3/10=5/8+1/8 x+3/10=3/4 x=3/4-3/10 x=30/40-12/40 x=9/20

-2×5/(8×0.625) =-2×5/5 =-2×1 =-2

3.72-0.375+2.28-0.625 =(3.72+2.28)-(0.375+0.625) =6-1 =5 101÷10/111-11又1/10 =101*111/10-111/10 =(101-1)*111/10 =100*111/10 =10*111 =1110 1/2004+2/2004+3/2004+……(省略号)+2003/2004 =(1+2+3+....+2003)/2004 =(1+2003)*2003/2/2004...

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