[P1] Express a 2-digit Number in terms of Tens and Ones

20 = (a)   tens

5 ones = (a)  

3 tens 8 ones = (a)  

79 = (a)   tens 9 ones

82 = (a)   + 2

4 tens 3 ones = (a)  

100 = (a)   tens

31 = 30 + (a)  

29 = (a)   tens + 9 ones

67 = (a)   + 7