Addition
3+5=?
8
10-5=?
5
2+__ =4
2
What facts are missing from the family?
4+3=7
______
7-4=3
_______
3+4=7
7-3+4
4, 6, 10
4+6=10
6+4=10
10-4=6
10-6=4
5+2=
7
10-7=
3
11-5=
6
What facts are missing from the family?
2+7=9
______
9-2=7
_______
7+2=9
9-7=2
4, 8, 12
4+8=12
8+4=12
12-4=8
12-8=4
10+10
20
18-9=
9
6-2=
4
What facts are missing from the family?
6+5=11
______
11-5=6
_______
5+6=11
11-6=5
11, 3, 8
3+8=11
8+3=11
11-3=8
11-8=3
8+8=
16
9-3=
6
15-5=
10
What facts are missing from the family?
6+7=13
______
13-6=7
_______
7+6=13
13-7=6
15, 5, 10
10+5=15
5+10=15
15-5=10
15-10=5
22+10
32
31-10=
21
16-7=
9
What facts are missing from the family?
7+8=15
______
15-8=7
_______
8+7=15
15-7=8
13, 10, 23
10+13=23
13+10=23
23-13=10
23-10=13