3.14乘4又十分之三加31.4乘百分之七十二减0.314乘15 (简算)

问题描述:

3.14乘4又十分之三加31.4乘百分之七十二减0.314乘15 (简算)

3.14 x 43/10+31.4 x 72/100-0.314x15
=0.314x(10 x 43/10+100 x 72/100-15 )
=0.314x(43+72-15)
=3.14