0.865*51%+51*35.5%/2*1/50+4.9%*12又1/5 简便计算

题目

0.865*51%+51*35.5%/2*1/50+4.9%*12又1/5 简便计算
一定要有过程!在线等!

答案

0.865*51%+51*35.5%/2*1/50+4.9%*12又1/5
=0.865*51%+51%*0.355+4.9%*61/5
=（0.865+0.355)*51%+4.9%*61/5
=1.22*51%+49%*1.22
=1.22*(51%+49%)
=1.22