Doubles
=8
Double 4
Which number needs 5 to make 10?
5
10 and what number makes 18?
10 + 8
Which neighboring numbers make 11?
6 + 5
9 and what number makes 12?
9 + 3
=12
Double 6
Which number needs 3 to make 10?
7
10 and what number makes 16?
10 + 6
Which neighboring numbers make 9?
4 + 5
9 and what number makes 14?
9 + 5
=16
Double 8
Which number needs 2 to make 10?
8
10 and what number makes 20?
10 + 10
Which neighboring numbers make 13
7 + 6
9 and what number makes 16?
9 + 7
=20
Double 10
Which number needs 0 to make 10?
10
10 and what number makes 10?
10 + 0
Which neighboring numbers make 15?
8 + 7
9 and what number makes 11?
9 + 2
=30
Double 15
Which number needs 5 to make 20?
15
10 and what number makes 11?
10 + 1
Which neighboring numbers make 17?
9 + 8
9 and what number makes 17?
9 + 8