[17/25-(2/5+3/20]×2/13
1个回答
[17/25-(2/5+3/20)]X2/13
=[17/25-11/20]X2/13
=13/100X2/13
=1/50
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(4/13+1/17)×13+4除以17 1/3除以(2/3-2/5)×3/5
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13/16×(9/13×17-9/13)-(12*4/5-3*5/13-2*8/13)
简便计算18/17÷19+1/19×16/17和(2/3+4/15×5/2)÷20/21和0.25×1.25×48
简便计算18/17÷19+1/19×16/17和(2/3+4/15×5/2)÷20/21和0.25×1.25×48
简便运算:17/25×5/37+8/25×17/37+17/37×2/25
2/11×13+2/13×15+2/15×17+2/17×19
2/11×13+2/13×15+2/15×17+2/17×19+1/19
【1】-1+(-2)+3【2】-2-1+2【3】5×2-(-20)【4】-20+70-60【5】25×32×125+(-