Students will express whether a number (up to 20) is even or odd by writing an equation. For even numbers, they write the number as a sum of two equal addends (e.g., 12 = 6 + 6). For odd numbers, they show the closest equal pair plus one (e.g., 11 = 5 + 5 + 1).
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Write an Equation to Show Whether a Number is Odd or Even
Grade 2 · Odd and Even Numbers · question 1 of 3
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An even number splits into two equal addends.
An odd number has one left after pairing.
Put 11 counters in pairs: 1 on top, 1 below. 5 pairs, and 1 counter has no partner. So 11 is odd.
An even number is a double: 10 = 5 + 5.
An odd number is a double and 1 more: 11 = 5 + 5 + 1.
Every even number splits into 2 equal rows.
Pair them up. All paired is even. 1 left over is odd.
Calling 11 even because 5 + 5 = 10 is close.
11 = 5 + 5 + 1. 1 is left over, so 11 is odd.
16 counters paired up make ___ pairs — 8. 16 = 8 + 8: 8 pairs, and every counter has a partner, so 16 is even.
Let's figure out if twelve is even or odd. We'll do it by pairing up.
Here is our number: twelve.
Picture twelve dots. We'll split them into two equal rows.
The top row has six dots.
The bottom row also has six dots — the same number!
Two equal groups means the number is even. Twelve equals...
...six...
...plus six.
Twelve equals six plus six, so twelve is even. Nice work!
While they climb, your page writes one true line to ask about tonight, and a short note each Sunday.
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An example student.
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14 days of every skill, practice packets, Fluency sheets and up to four students. No card.