47+2= 20+32= 48-8= 85-80= 700+7000=
56÷7= 38-30= 9×6= 28÷7= 3800-800=
50+100= 38+50= 68+2= 88-7= 8700-8000=
680-600= 18-9= 5×8= 56-7= 4000+100=