In this activity, we will be carrying out a subtraction and then deciding whether the answer is odd or even.
Example
Is the answer to this odd or even?
81 - 61
Answer
81 - 61 = 20
Numbers that end in the digit 0, 2, 4, 6 or 8 are even.
Numbers that end in the digit 1, 3, 5, 7 or 9 are odd.
20 is even.
Are you happy with that?
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