Question

帮忙一下,给我讲解讲解数学题!计算下面各题8×3.4+3.6÷0.6(全题写过程和讲解)七分之九÷五分之十二+九分之二×

Answer 1

8×3.4+3.6÷0.6=27.2+6=33.2

9/7÷12/5+2/9×5/12=9/7×5/12+2/9×5/12=5/12×(9/7+2/9)=5/12×95/63=475/756

(1/2+1/7－7/12)÷1/7=(1/2+1/7－7/12)×7=7/2+1-49/12=5/12