= |
= |
2 = |
= |
= |
= |
= |
= |
7 = |
0.52﹣0.22= |
+ = | ﹣ = | ÷ = | 1÷ = |
17× = | ﹣ = | 3﹣4× = | 1﹣ ﹣ = |
28×( + )= | 1 × = |
|
× = 、
× ÷3
×2 ×4 ÷
3.6× = ÷5= 16× = 14﹣ =
21÷ = 2.7× = ÷ = + - + =
× ÷
÷ × ÷1 ×1
÷ × × ÷
× ÷ ÷ ×
525+398= 12.5×4= 0.23= 5.6÷0.8= × ÷ × =
2- = × = ÷12= ÷ ÷ = + ÷2=
905-598= 0.3+7= 0.72÷0.6= 6÷7= 0.45×6×0.5=
÷ = + = 4÷ ×9= × = × ÷ × =