1.6*8+9.9*4的简便计算是1.6*8+8.8*4

问题描述:

1.6*8+9.9*4的简便计算
是1.6*8+8.8*4

(1.6+9.9)*4+1.6*4
=11.5*4+1.6*4
=46+6.4
=

8*(1.6+1.1*4)=48

1.6*8+8.8*4
=1.6*8+8*1.1*4
=8*(1.6+4.4)
=8*6
=48

1.6*8+9.9*4
=3.2*4+9.9*4
=(3.2+9.9)*4
=(10+3.1)*4
=40+12.4
=52.4