1 ten and 8 ones = 18
5 tens and 5 ones = 55
8 tens and 3 ones = 83
6 tens and 6 ones = 66
2 tens and 7 ones = 27
2 tens and 4 ones = 24
27 + 12 = 39
4 tens and 2 ones = 42
7 tens and 4 ones = 74
6 tens and 4 ones = 64
46 + 32 = 78
4 tens and 8 ones = 48
23 + 46 = 69
7 tens and 0 ones = 70
37 + 12 = 49
55 + 43 = 98
9 tens and 8 ones = 98
5 tens and 4 ones = 54
24 + 35 = 59
6 tens and 0 ones = 60
14 + 25 = 39