①a×0.6②a÷0.6③a×0.8④a÷0.8
720.5=36 720.5=144 72.5=48 721.5=108
4.6×0.32= 91.2÷7.6= 78.6÷11=(商用循环小数表示)
96-69= 0.72+2.8= 0.125×0.8= 0.32÷0.1=
4× ÷4× = 7÷ = 1- =
403×19= -80%= ( - )×12=
687+95= 0.46+4.9=
0.5×2.4= 0.84÷0.7= 2.6× =
1.25× ×8=