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3 - 1 = ?
1 + ___ = 3, so 3 - 1 = ___
3 - 1 = 2
1 + 2 = 3, so 3 - 1 = 2
5 - 2 = ?
2 + ___ = 5, so 5 - 2 = ___
5 - 2 = 3
2 + 3 = 5, so 5 - 2 = 3
7 - 4 = ?
4 + ___ = 7, so 7 - 4 = ___
7 - 4 = 3
4 + 3 = 7, so 7 - 4 = 3
10 - 6 = ?
6 + ___ = 10, so 10 - 6 = ___
10 - 6 = 4
6 + 4 = 10, so 10 - 6 = 4
8 - 6 = ?
6 + ___ = 8, so 8 - 6 = ___
8 - 6 = 2
6 + 2 = 8, so 8 - 6 = 2
Write 8 - 4 = 4 as an addition problem.
4 + 4 = 8
Write 10 - 5 = 5 as an addition problem.
5 + 5 = 10
Write 7 - 5 = 2 as an addition problem.
5 + 2 = 7
2 + 5 = 7
Write 6 - 3 = 3 as an addition problem.
3 + 3 = 6
Write 9 - 6 = 3 as an addition problem.
3 + 6 = 9
6 + 3 = 9
6 + __ = 12, so 12 - 6 = __
6 + 6 = 12, so 12 - 6 =6
7 + __ = 11, so 11 - 7 = __
7 + 4 = 11, so 11 - 7 = 4
8 + __ = 13, so 13 - 8 = __
8 + 5 = 13, so 13 - 8 =5
9 + __ = 15, so 15 - 9 = __
9 + 6 = 15, so 15 - 9 = 6
4 + __ = 9, so 9 - 4 = __
4 + 5 = 9, so 9 - 4 =5