Question

583+674-(574+183)+2.998+3.99+998+3+9 这道简便计算怎么做？

Answer 1

583+674－(574+183)+2.998+3.99+998+3+9
=583+674－574－183+2.998+3.99+998+3+9
=(583－183)+(674－574)+(3－0.002)+(4－0.01)+(1000－2)+3+9
=400+100+3+4+3+1000+9－0.002－0.01－2
=1510+(9－2－0.012)
=1510+6.988
=1516.988

Answer 2

①去括号②可以加3-0.002加4-0.01把三分成2+1具体如下583+674-（574+183）+2.998+3.99+998+3+9=583-183+674-574+2.998+3.99+998+2+1+9=400+100+1000+10+3-0.002+4-0.01=1513-0.012=1512.988

Answer 3

583+674-（574+183）+2.998+3.99+998+3+9
=583+674-574-183+2+0.998+3.99+988+3+9
=（583-183）+（674-574）+2.998+3.99+998+3+9
=400+100+2+998+0.998+4-0.01+3+9
=500+1000+1-0.002+4-0.01+3+9
=1500+17-0.012
=1517-0.012
=1516.88