简便运算(要过程):①1又5/8+2又1/6+1.375+4又5/6

12个回答

  • 简便运算(要过程):①1又5/8+2又1/6+1.375+4又5/6

    =1又5/8+1又3/8+2又1/6+4又5/6

    =3+7

    =10

    ②10-10又8/11-8又311

    =10-(10又8/11+8又311)

    =10-19

    =-9

    ③2又1/3+3又7/10+1又2/3

    =2又1/3+1又2/3+3又7/10

    =4+3又7/10

    =7又7/10

    ④9.24-3又3/5-2又2/5

    =9.24-(3又3/5+2又2/5)

    =9.24-6

    =3.24

    ⑤0.75+1/10-1/2

    =3/4-2/4+1/10

    =1/4+1/10

    =7/20

    ⑥1又11/12+(2又1/3-1/4)

    =1又11/12+2又4/12-3/12

    =1又11/12+2又1/12

    =4

    解决问题(要过程)

    ①甲、乙两辆车共运货物10.5t,甲车运的货物比乙车运的2倍少1/2t,甲乙两车共运货物多少t?

    ②一块上底是29m,下底是52m,高是10m的体性第里种油菜,株距0.2m,行距0.27m.这块地里可种油菜多少株?

    ③工人们要为一个长50m、宽15m、深2m的游泳池上贴上瓷砖,要贴多少平方米?

    50*15+2*15*2+2*50*2=750+60+200=1010平方米

    计算(要过程)

    3又1/4+(2.2+4又7/10)-(2又1/4-1又5/6)

    =3又1/4+2又2/10+4又7/10-2又1/4+1又5/6

    =3又1/4-2又1/4+6又9/10+1又5/6

    =1+6又27/30+1又25/30

    =9又11/15