Adding (2 Digit +1 Digit)
What is 10+4?
14
What is 20+30?
50
What is 16-2?
14
What is 51-9?
42
What does 21 decompose into?
20 and 1 or 2 tens and 1 one.
What is 22+7?
29
What is 28+12?
40
What is 29-3?
26
What is 62-6?
56
What does 52 decompose into?
50 and 2 or 5 tens and 2 ones.
What is 36+3?
39
What is 37+13
50
What is 38-7?
31
What is 78-9?
69
What does 68 decompose into?
60 and 8 or 6 tens and 8 ones.
What is 68+9?
77
What is 47+17?
64
What is 85-31?
54
What is 30-18?
12
What does 90 decompose into?
90 and 0 or 9 tens and 0 ones.
What is 84+8?
92
What is 86+13?
99
What is 89-19?
70
What is 75-36?
39
What does 100 decompose into?
100, 0 and 0 or 1 hundred, 0 tens and 0 ones.