5.86+1.8*1.2+1.44用简便方法怎样计算

晕，这种还要用简便方法啊，本来就很简便了啊

5.86+1.8x1.2+1.44
=5.86+1.8x1.2+1.2×1.2
=5.86+（1.8+1.2）×1.2
=5.86＋3x1.2
=5.86＋3.6
=9.46

计算器计算

5.86+1.8*1.2+1.44
=5.86+1.8*1.2+1.2*1.2
=5.86+1.2*(1.8+1.2)
=5.86+1.2*3
=5.86+3.6
=9.46

1.44=1.2*1.2

5.86+1.8*1.2+1.44
=5.86+1.8*1.2+1.2*1.2
=5.86+(1.8+1.2)*1.2
=5.87+3*1.2
=5.86+3.6
=9.46

1.8*1.2=2.16，2.16+1.44=3.6，3.6+5.86=9.46
1.6*1.4、2.3*2.7……都可以用首位加1相乘的积=末位相乘的积。如：14*16=1*2+4*6=224