Chapter 2 - Lesson 1 and 4 - Review

Chapter 2 - Lesson 1 and 4 - Review

Multiple Choice

Which property describes this problem? 1+0=1

• Commutative Property of Addition

• Identity Property of Addition

• Associative Property of Addition

• This problem isn't any of the properties.

Multiple Choice

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

• (3+2)+4=3+(2+4)

• 1+2=2+1

• 3+0=3

• 1+2+3=6

Multiple Choice

Which property has the addends switched around?

• identity

• commutative

• associative

• none of them

Multiple Choice

Which property uses parentheses?

• identity

• commutative

• associative

• all of the properties

Multiple Choice

Which property describes the following problem? 3+2=2+3

• Identity Property

• Commutative Property

• Associative Property

• Math Property

Multiple Choice

7 + 0 = 7

• commutative

• identity

• associative

Multiple Choice

6 + 5 = 5 + 6

• commutative

• identity

• associative

Multiple Choice

8 + 0 = 8

• commutative

• identity

• associative

Multiple Choice

4 + 7 = 7 + 4

• commutative

• identity

• associative

Subtraction Rules

When you subtract 0 from any number, the result is the number.

Example:

22 - 0 = 22

14 - 0 = 14

When you subtract any number from itself, the result is 0.

Example:

16 - 16 = 0

20 - 20 = 0

Multiple Choice

When you subtract any number from itself, the result is _____

• 0

• 10

• 1

Multiple Choice

When you subtract _____ from any number, the result is the number.

• 10

• 0

• 1

Estimate Sums and Differences

When you estimate to add or subtract, you need to round to a given place value. The next slide is a video on how to estimate to add. You would do the same for subtracting.

Multiple Choice

Estimate the difference of 470-289 by rounding to the nearest hundreds

• 300
• 100
• 181
• 200

Multiple Choice

Round to the nearest hundred, then estimate the difference:

642 − 137

• 600

• 780

• 500

• 510

Multiple Choice

Round to the nearest thousand, then estimate the sum:

66,246 + 22,651

• 89,000

• 88,000

• 90,000

• 89,748

Multiple Choice

Round to the nearest thousand, then estimate the sum:

2,764 + 4,851

• 7,000

• 6,000

• 5,000

• 8,000

Multiple Choice

Round to the nearest hundred, then estimate the sum:

123 + 456

• 580

• 600

• 650

• 500