30÷=
+=
=
÷12=
×3=
2.5
÷ = ÷3= ×= × = 6× = 15÷ =
+ = - = 1- + = + - + =
8÷4=
4÷8=
÷ =
÷ 1.5=
÷11=
÷1=
÷ 1=
÷0.5=
24+11= 1.2+0.4= 1- =
× = 1.8÷0.3= 2- =
+ = 3.6÷0.4= ×16=
54÷18= 0.375+ = 0÷ =
8.1÷9= ×15= × =
1.25×8= 0.8×31= + =
13.8-7= ÷9= ÷4=
0.5×0.6= ×12= 10-0.5=
0.25×0.8×4= 1- - = 1-3÷8=
÷7= 2.63-1.7= 350× = 0.77+0.33=
728-299= 3.6×25%= 6÷ =
3- = 1- + = 0÷ =