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72x5 72x5的简便运算

72x 5/71=(71+1)x5/71=71x5/71+5/71=5+5/71=5又5/71

简便计算72x5+25x1572*5+25*15=72*5+25*3*5=(72+75)*5=147*5=735

270(72x5)的简便算法270(72x5=270÷(6*5*12)=270÷30÷12=9÷12=3/4

7200÷(72X5)怎样简便计算7200÷(72X5)=7200÷72÷5=100÷5=20

720÷(72*5)=720÷72÷5=10÷5=2

72x(120十5)简便计算72x(120十5)=72*120+72*5=8640+360=9000

36x72-72x5+ 69x72=(36-5+69)x72=100x72=7200

72x53=72x50+72x3=3600+216=381641x24=40x24+1x24=960+24=984125x5=125x4+125=500+125=62532x5=30x5+2x5=150+10=160

因为都是乘号,所以先去掉括号,得72X8X125X5; 然后换一下顺序,(8X125)X(5X72);8X125=1000,72X5=360,1000X360=360000;整体式子就是:(8X125)X(5X72)=1000X360=360000

26x5+13x2=13x2x5+13x2=13x2x(5+1)=26x6=15626x5+13x2=26x5+26=26x(5+1)=26x6=156

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