×3= 27÷ = 0.22= 40%÷20=
①
②
③
×2= ÷5= 7.8× = × ×0=
÷ = ×1.4= 10÷0.1= ( - )÷ =
3.14×52= -0.6= + ×7= x ÷ ÷ =
×0.81= ÷3= 1÷3× = 3.6÷ = 15× =
0×= 10÷=
×= ÷=