简便运算:9.42*10-94.2*0.9 3.61/(7.2-5.3)*25

问题描述:

简便运算:9.42*10-94.2*0.9 3.61/(7.2-5.3)*25

9.42*10-94.2*0.9
=94.2-94.2*0.9
=94.2*(1-0.9)
=94.2*0.1
=9.42
3.61/(7.2-5.3)*25
=3.61/1.9*25
=1.9*25
=(2-0.1)*25
=2*25-0.1*25
=50-2.5
=47.5第二题好乱啊~请重新写一下3.61/(7.2-5.3)*25=3.61/1.9*25=1.9*25=(2-0.1)*25=2*25-0.1*25=50-2.5=47.52.4*1.5+3.6/1.5 怎么算2.4*1.5+3.6/1.5=2.4*1.5+2.4=2.4*(1.5+1)=2.4*2.5=6