0.547×65+54.7×0.45—5.47=? 要简便计算

问题描述:

0.547×65+54.7×0.45—5.47=? 要简便计算

原式=54.7*0.65+54.7*0.45-54.7*0.1=54.7*(0.65+0.45-0.1)=54.7(1.1-0.1)=54.7。 (“*”是“乘以”)

0.547×65+54.7×0.45-5.47
=5.47×6.5+5.47×4.5-5.47
=5.47×(6.5+4.5-1)
=5.47×10
=54.7

0.547×65+54.7×0.45—5.47
=5.47×6.5+5.47×4.5—5.47
=5.47×(6.5+4.5-1)
=5.47×10
=54.7