42.5*99+42.5*2-42.5怎样简便计算

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42.5*99+42.5*2-42.5怎样简便计算42.5*99+42.5*2-42.5怎样简便计算42.5*99+42.5*2-42.5怎样简便计算42.5*99+42.5*2-42.5=42.5*

42.5*99+42.5*2-42.5怎样简便计算
42.5*99+42.5*2-42.5怎样简便计算

42.5*99+42.5*2-42.5怎样简便计算
42.5*99+42.5*2-42.5
=42.5*(99+2-1)
=42.5*100
=4250

42.5*99+42.5*2-42.5
=42.5*(99+2-1)
=42.5*100
=4250

42.5*99+42.5*2-42.5
=42.5*(99+2-1)
=42.5*100
=4250

42.5*99+42.5*2-42.5=42.5*(99+2-1)=42.5*100=4250

42.5*99+42.5*2-42.5
=42.5*(99+2-1)
=42.5*100
=4250

=42.5*(99+2-1)
=42.5*100
=4250

=42.5X(99+2-1)
=42.5X100
=4250
一定对