Doubles
2+2=
4
3+2=
5
4-2=
2
addition problem
+
2,4, _,8,10
6
4+4=
8
4+5=
9
5-4=
1
subtraction problem
-
5,10,_,20,25
15
5+5=
6+4=
10
8-5=
3
equal
=
10,20,30,_,50
40
7+7=
14
10+3=
13
10-8=
2
sum
+
50,55,_,65,70
60
9+9=
18
9+5=
14
12-4=
8
fewer
-
22,24,26,28,_
30