作业帮怎样简便怎样算216＋64×42÷28 87×26-26×37 4700÷25÷48.29＋3.7＋0.71＋6.3 125×32×25 9-1.45+3.75
来源：学生作业帮助网 编辑：作业帮 时间：2024/05/12 18:18:51
怎样简便怎样算216＋64×42÷28 87×26-26×37 4700÷25÷48.29＋3.7＋0.71＋6.3 125×32×25 9-1.45+3.75
怎样简便怎样算
216＋64×42÷28 87×26-26×37 4700÷25÷4
8.29＋3.7＋0.71＋6.3 125×32×25 9-1.45+3.75
怎样简便怎样算216＋64×42÷28 87×26-26×37 4700÷25÷48.29＋3.7＋0.71＋6.3 125×32×25 9-1.45+3.75
216＋64×42÷28
=216+16×4×7×6÷4÷7
=216+16×6
=312
87×26-26×37
=26×（87-37）
=26×50
=1300
4700÷25÷4
=4700÷（25×4）
=4700÷100
=47
8.29＋3.7＋0.71＋6.3
=8.29+0.71+3.7+6.3
=9+10
=19
125×32×25
=125×8×4×25
=1000×100
=100000
9-1.45+3.75
=9-1+3-0.45+0.75
=12.3
4700÷25÷4 87×26-26×37
=4700÷100 =26×(87-26)
= 4700÷(25×4) =26×41
=47