math
solve 350-250
150
solve 29+80
109
solve 500+45
545
solve 456+6
466
solve 23-24
-1
solve 123-123
0
solve 566+209
779
solve 783-10
773
solve 789-20
769
solve 897-40
857
solve 789-70
719
solve 675+4
679
solve 903-3
=900
solve 675+20
695
solve 243-33
=213
solve 678-30
648
solve 47+14
61
solve892-92
=800
solve 876-67
16
solve 543+10
533
solve 342-40
302
solve 745+20
765
solve 890+10
900
solve 654+50
704
solve 1100-1000
100