43.54+6.4-3.54+12.6怎么简便计算?

问题描述:

43.54+6.4-3.54+12.6怎么简便计算?

先算43.54-3.54,再算6.4+12.6,再把结果相加

43.54-3.54+12.6+6.4
=40+19
=21

43.54+6.4-3.54+12.6
=(43.54-3.54)+(12.6+6.4)
=40+19
=59

(43.54-3.54)+(6.4+12.6)=40+19=59

43.54+6.4-3.54+12.6
=(43.54-3.54)+(12.6+6.4)
=40+19
=59
你能明白,赞同