number problems

WALT: Solve number problems by using more than one strategy.
problem one first strategy 34 + --- = 192
34 + 58 is 92  
so i know that
34 + 158 = 192
so the answer is 158
second strategy
34 + 50 = 84
and 84 + 8 = 92
so i did 34 + 150 = 184
and 184 + 8 = 192

problem two
27 + 3 = 30  my answer is 84 because
30 + 30 = 60
60 + 6 = 66
66 + 10 = 76
7 6 + 8 = 84
second strategy
27 +30 = 57
57 + 9 = 66
66 + 10 = 76
76 + 8 = 84