ADD  SUBTRACT  DOUBLE DIGITS ADD  DOUBLE DIGITS SUBTRACT 

What is 2+2
4

What is 27
5

What is 10+2
12

What is 156
9

What is 2+4
6

What is 56
1

What is 12+6
18

What is 168
8

What is 2+9
11

What is 67
1

What is 13+7
20

What is 128
4

What is 5+5
10

What is 84
2

What is 10+5
15

What is 147
7

What is 6+9
15

What is 83
5

What is 10+7
17

What is 208
12
