addition for 2nd
1000+2040=
3040
456-321=
135
24×17=
408
5
_
?
2
314-12=
302
49+31=
80
41-21=
20
EASY:100×3=
300
6
_
?
4
23×3=
69
EASY:16+7=
23
569-357=
212
56×13=
728
9
_
?
7
890+900=
1790
5486+349+4=
5839
14-10=
4 (example: just add 4+10 but it's 14-10.)
780×12=
936
3
_
?
1
EASY:12-13=
1
487+19=
506
EASY: 23-23=
0.
EASY:12×5=
60
1
_
?
0
7×8=
56