Double Facts
5+5=
10
9-6=
3
2 tens 8 ones
28
+12
22
5+4=
9
6+6=
12
12-5=
7
5 tens 1 one
51
26
+32
58
7+5=
12
7+7=
14
15-4=
11
1 ten 6 ones
16
+44
88
9+6=
15
8+8=
16
17-8=
9
1 hundred 2 tens 0 ones
120
+31
88
12+5=
17
9+9=
18
20-9=
11
1 hundred 0 tens 3 ones
103
+15
99
16+4=
20