2.2 Addition Patterns

Pablo finds the sum of two addends. The sum is odd. Which statement is true about the addends? HINT: Make up some numbers and see which statement is true.

• Both addends are odd.

• Both addends are even.

• The addends are both odd or both even.

• One addend is odd and one addend is even.

Kara wrote this number sentence to show how many yellow stickers and green stickers she earned. Which describes Kara’s number sentence?

7 + 0 = 7

• Commutative Property of Addition

• Identity Property of Addition

• odd + odd = odd

• even + even = even

Maria wrote the number sentence 4 + 7 = 11. Which number sentence shows the Commutative Property of Addition?

• 11 − 4 = 7

• 3 + 4 = 7

• 4 + 7 = 11

• 7 + 4 = 11

Gregory finds the sum of two addends. The sum is even. Which could not be Gregory’s addends? HINT: LOOK AT ALL THE CHOICES and solve the problems.

• 3 + 10

• 7 + 1

• 7 + 7

• 10 + 12

Ruby says she has read an even number of books. She has read 9 fiction books and 8 nonfiction books. Is Ruby correct? Solve the problem then answer the question.

• No

• Yes

Liam finds this sum.

8 + (2 + 5) = (8 + 2) + 5 = 15

Which property does Liam use?

• Associative Property of Addition

• Commutative Property of Addition

• Identity Property of Addition

• Zero Property of Addition

Mitchell uses the Commutative Property of Addition to find a sum.

8 + 4 = ___

Which shows how Mitchell found the sum?

• 8 + 0 = 8

• 4 + 8 = 12

• 4 + 0 = 4

• 0 + 12 = 12

Anna uses the Associative Property of Addition to find a sum.

8 + 2 + 6 = ___

Which shows how Anna found the sum?

• 6 + 8 + 2 = 16

• 16 + 0 = 16

• 2 + 8 + 6 = 16

• (8 + 2) + 6 = 16

215, 315, 415, 515, 615, _____

• 413
• 715
• 815
• 432

What are the missing numbers in this pattern?
23, 33, ___, 53, ___, 73

• 32, 62
• 42, 63
• 43, 63
• 42, 62