3.4+1.25*2.4怎样简便计算

2025-01-07 07:24:10
推荐回答(4个)
回答1:

3.4+1.25*2.4=3.4+1.25*(2+0.4)=3.4+1.25*2+1.25*0.4=3.4+2.5+0.5=3.4+3=6.4

回答2:

=3.4+1.25*8*0.3
=3.4+10*0.3
=3.4+3
=6.4

回答3:

3.4+1.25*2.4
=3.4+1.25*8*0.3
=3.4+10*0.3
=3.4+3
=6.4

回答4:

=3.4+5/4*12/5=3.4+12/4=3.4+3=6.4