380+620=
503×0=
=
299×5≈
1-=
201+398=
107×8=
498-206≈
125×4=
8×49=
3×( )≈270
120÷30 = 640÷80 = 360÷90 = 720÷80 =
320÷80 = 180÷30 = 100÷20 = 220÷20 =
8.3-2.1= 5.6+8= 60X90= 3000÷5=
38×58= 425÷7= 118÷3= 2.2-0.7=