Hint



Test
5 + 4 = ?
Makes a 10
Double
Near double
6 + 4 = ?
Makes a 10
Double
Near double
7 + 3 = ?
Makes a 10
Double
Near double
7 + 7 = ?
Makes a 10
Double
Near double
8 + 7 = ?
Makes a 10
Double
Near double
6 + 6 = ?
Makes a 10
Double
Near double