7/15*3/8+1/15*7/16+1/15*3.5如何计算谢谢、、、急
问题描述:
7/15*3/8+1/15*7/16+1/15*3.5如何计算
谢谢、、、急
答
7/15*3/8+1/15*7/16+1/15*3.5
=(7*3)/(15*8)+(1*7)/(15*16)+(1*7)/(2*15)
=7(3*2+1+8)/(15*16)
=(7*15)/(15*16)
=7/16