Question

Двузначные числа. 10+30,40-1,80-50, 13-10, 29+1, 2+7.

Answer 1

40, 39, 30, 3 , 30, 9

Answer 2

10+30=40,40-1=39,80-50=30,13-10=3,29+1=30,2+7=9