÷ = ×8= × = ÷14= ÷ =
× = × = 0× = ÷ =
=
3.9×=
9÷=
3+1%=
A,- 20, B、- 1.5 C、+10 D、+5, E、- 6 F、- 9
哪个足球的质量好一些?
340﹣160= 3.72+5.28= 3÷15= ×= 27×30%=
1.03﹣0.37﹣0.43= ÷×3= 0.1÷0.25÷0.4= ×(14+)= ×﹣=