簡便計算450×54+460×45
- 2022-03-29
450×54+460×45
=45×540+460×45
=45×(540+460)
=45×1000
=45000
320×54+460×32
=32×540+460×32
=32x(540+460)
=32x1000
=32000
450×54+460×45= 450×54+(450+10)×45=450×54+450×45+10x45=450x(54+45)+450=450x99+450=450x(100-1)+450=450x100-450+450=45000
解: 450×54+460×45
=450×54+(450+10)×45
=450×54+450×45+450
=450×(54+45+1)
=450×100
=45000