2-min Fluency Warm-up — Count by 2s in your head. Fill the blanks fast!
2, 4, 6,
10, 12, 14,
20, 22, 24,
30, 32, 34,
Even numbers can be split into pairs with no one left over. Odd numbers always have 1 left over. Even numbers end in 0, 2, 4, 6, 8. Odd numbers end in 1, 3, 5, 7, 9.
6 is EVEN — 3 pairs, nobody left out:
6 = 3 + 3 (equal addends!)
7 is ODD — 3 pairs and 1 left over:
7 = 3 + 3 + 1
Circle pairs of dots. Then write odd or even, and the doubles equation if it is even.
8 is:
If even: 8 = +
11 is:
If even: 11 = +
14 is:
If even: 14 = +
9 is:
If even: 9 = +
Number Talk — Explain WITHOUT counting or pairing.
Is 46 odd or even? How can you tell just by looking at the number?
My thinking:
If you add two even numbers, will the answer be odd or even? Why?
My thinking:
Challenge — Show two different ways to prove that 13 is odd.
Ideas: draw and pair dots, look at the last digit, try to write it as a double.
Way 1:
Way 2: