32×2= 300×4= 57-35= 25÷6= 21÷3+65=
30×3= 16+43= 21×4= 400×2= 2000×3=
12×2= 24÷3÷4= 24×2= 8×10-65= 0×9+36=
- = + = - = + = 1- =