Adding-1
4+5=
3+5=
8
12-10=
12-8=
4
1x7=
7
23+7=
30
20+15=
35
100-70=
30
150-100=
50
3x15=
45
21+19=
40
12+30=
42
90-15=
75
70-50=
20
9x3=
27
46+16
62
120+42=
162
45-10=
35
405-197=
208
7x12=
84
83+78=
161
270+30=
300
289-76=
213
1,897- 365=
1532
5x24=
120