+=
÷2=
1.25×80%=
1÷=
:=
5÷20%=
-=
1.8×=
135+398= 5-0.5= 0.24×50= - =
1.25×9×8= 2×0.99= ÷4= 1.5- =
7.5×100=
1.3+2.4=
25×40=
630÷90=
4.8×=
÷14=
305-199= ×0= 31×197≈
3.5×0.2= 2.4×=