Level 1 Lecture 3 : Terms of Addition and Subtraction

15 + 20 = 35 is .................... sentence

• subtraction

• Addition

• plus

• minus

The following problem is an example of which property? (3+1)+2=3+(1+2)

• Identity Property of Addition

• Commutative Property of Addition

• This problem isn't any of the properties.

• Associative Property of Addition

Which ONE of the following problems uses the Identity Property of Addition?

• 10+5=5+10

• (2+3)+1=2+(3+1)

• 10+0=10

• none of the above

What is another name for Identity Property?

• Group

• Order

• Zero

• commutative

The _______________ property of addition states that any number plus zero equals the other number.

• closure

• associative

• commutative

• identity

The _______________ property of addition states that the order you add three or more  numbers doesn't change the sum (answer).

• identity

• associative

• closure

• commutative

Identify the fact family for the numbers 2, 3, and 5.

• The fact family for the numbers 2, 3, and 5 is: 2 + 3 = 5, 3 + 2 = 5, 5 - 2 = 3, 5 - 3 = 2.

• 3 + 5 = 8, 2 - 3 = -1, 5 + 3 = 8

• 2 + 5 = 7, 3 - 2 = 1, 5 - 5 = 0

• 2 - 3 = 1, 3 - 5 = -2, 5 + 2 = 7

Solve the word problem: Sarah has 12 apples. She gives 4 to her friend. How many apples does she have left?

• 10

• 8

• 6

• 4

What is the addition sentence that corresponds to the subtraction sentence 10 - 3 = 7?

• 7 - 3 = 4

• 10 + 3 = 13

• 3 - 10 = -7

• 7 + 3 = 10

7 + 9 = 9 + 7 expresses the property of ................. .

• closure

• associative

• commutative

• identity