37+68=
21﹣0.1=
3.6× =
÷50%=
0.5: =
1.25×8=
21×498≈
723÷89≈
- = × = 80÷10%= 42×3.14=
30%+0.45= 3.6÷0.18= 2- = 6- - =
52-30=
12×6=
5.6+7=
36+64=
-=
÷=
×36=
+=