25.48-(9.4-4.52) 0.45×201 28×【(7.88+1.22)÷26】简便计算!有些题也可以不简便

问题描述:

25.48-(9.4-4.52) 0.45×201 28×【(7.88+1.22)÷26】简便计算!有些题也可以不简便

25.48-(9.4-4.52)
=25.48-9.4+4.52
=25.48+4.52-9.4
=30-9.4
=20.6
0.45×201
=0.45×(200+1)
=0.45×200+0.45×1
=90+0.45
=90.45
28×【(7.88+1.22)÷26】
=28×(9.1)÷26
=28×13×0.7÷(13×2)
=28×13×0.7÷13÷2
=28×0.7÷2
=28÷2×0.7
=14×0.7
=9.8

25.48-(9.4-4.52)=25.48-9.4+4.52=25.48+4.52-9.4=30-9.4=20.60.45×201 =0.45×(200+1)=0.45×200+0.45×1=90+0.45=90.4528×【(7.88+1.22)÷26】=28×【9.1÷26】=28×0.35=9.8