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9x@ 5 x%3 简便计算

=(5-0.1)x3.6/2=(5-0.1)x1.8=5x1.8-0.1x1.8=9-0.18=8.82

14X(9x5)=14*9*5=(14*5)*9=60*9=540

(5/9x7/10-1/3)x6/5=(7/18-1/3)x6/5=1/18x6/5=1/15

5x9x25x4=25*4*5*9=100*5*9=4500

1/5加2/9x3/10=1/5+1/15=3/15+1/15=4/15

(7x8)x(9x5)=7x9x(8x5)=63x40=2520

(5/9x7/10一1/3)x5=(7/18一1/3)x5=1/18x5=5/18

=(-5/13)*(4/5+3/5-8/5)=(-5/13)*(-1/5)=1/13,请采纳,谢谢.

9x5十9简便方法计算=9*5+9=9*(5+1)=9*6=54

简便计算5/9*3/8+4/9x3/8=(5/9+4/9)*3/8=1*3/8=3/85/9+4/9x3/8=5/9+1/6=13/18

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