×12= 1÷= ÷= 0×=
×= 24×= ÷6= ×2.4=
=
①(-)÷
②×+÷11
③5÷[(-)×]
×= += ×= 14÷=
÷= 0×= ×1.2×1.4= 15-=
3.14×5= 3.14×7= 3.14×= 3.14×=
÷= 21÷= ×0.3= ÷-×0=
0.55-= ÷4.5= ×= +×30%=
×2.1= 12÷ = × = ×15= 1÷4× =
0.15× = 1÷ = 0÷ = 24× = ÷ × ÷ =