×=
×3=
14÷=
÷=
+=
3-=
÷4=
÷×=
1+30%= 20÷0.1%= +×5=
+= ÷= ××=
3.6×()
5÷() 0.75×5.8+5.2×-75%
①
②
③
④
37.5×+37.5×62.5%+62.5×0.75