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Unit 8 - Lesson 4 - Grade 2: Illustrative Mathematics

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21 Questions
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Grade 2 Unit 8
Lesson 4: Decompose Even and Odd Numbers
CC BY 2021 Illustrative Mathematics
Grade 2 Unit 8
Lesson 4: Decompose Even and Odd Numbers
CC BY 2021 Illustrative Mathematics
Lesson: Decompose Even and Odd Numbers

Number Talk: Equal Addends (Warm Up)

Find the value of each expression mentally.

Find the value of each expression mentally.

Find the value of each expression mentally.

Find the value of each expression mentally.

Share in Different Ways

Kiran baked 12 cookies. He wants to put them in two gift bags. Show a few different ways he can share the cookies.
Can both bags have the same amount of cookies?

12 = _______+_______
Can both bags have an even number of cookies?

12 = _______+_______
Can both bags have an odd number of cookies?

12 = _______+_______
Can one bag have an even number of cookies and the other have an odd number of cookies?

12 = _______+_______
Lin baked 14 cookies. She wants to put them in two gift bags. Show a few different ways she can share
the cookies.
Can both bags have the same amount of cookies?

14 = _______+_______
Can both bags have an even number of cookies?

14 = _______+_______
Can both bags have an odd number of cookies?

14 = _______+_______
Can one bag have an even number of cookies and the other have an odd number of cookies?

14 = _______+_______
Noah baked 15 cookies. He wants to put them in two gift bags. Show a few different ways he can share
the cookies.
Can both bags have the same amount of cookies?

15 = _______+_______
Can both bags have an even number of cookies?

15 = _______+_______
Can both bags have an odd number of cookies?

1 = _______+_______
Can one bag have an even number of cookies and the other have an odd number of cookies?

15 = _______+_______

Represent Numbers with Two Addends

  1. Pick a number between 0 and 20.
  2. Decide with your partner whether the number is even or odd.
  3. Complete the equation to show your number as the sum of two equal addends. If you cannot use two equal addends, use two addends that are as close as possible.

Cool Down: Two Equal Addends

Decide whether the number of dots is even or odd.

Write an equation with two equal addends for each image if you can.

_______ = _______ + _______

Decide whether the number of dots is even or odd.

Write an equation with two equal addends for each image if you can.

_______ = _______ + _______