1÷ =
÷
= 9×
=
÷
=
90÷6= 18× = 32×0.5= 1×
=
×
=
-
= 43÷5= 1-
=
0.87÷0.29= 20÷ =
×20=
×
=
+
=
-
=
-
= 72÷
=