(37x15-55)x8的简便运算:
8x0.125除以0.125x8用简便方法8x0.125除以0.125x8=8*0.125÷0.125*8=8*8=64
=37*(0.125*8)=37*1=37
用简便方法计算下题37x15+ 63x15=15*(37+63)=15*100=1500
先去掉括号变成25乘8+15乘8. 25乘8等于200.15乘8等于120.然后加起来就好了320 (25*15)*8=(25*8)+(15*8)= 200+120= 320
=37*(125*8)=37*1000=37000
286-15*8+232=286-120+232=166+232=398
37X99=37X[100-1]=37X100-37X1=3700-37=3663
87x15+13x15=(87+13)x15=100x15=1500
=(15x8)÷(1.25x8) =120÷10 =12