Estimating Multiplication

Estimating Multiplication

Review

Vocabulary

Factor, Product, Multiply, Estimate, Expression, Equation

Multiple Choice

Expression

• includes the equal sign and product

• excludes the equal sign and product

Multiple Choice

A strategy we use to make math easy and check for reasonableness is...

• Multiply

• Estimate

• Charts

• Divide

Multiple Choice

Multiply

• Separate equal groups

• Join unlike groups

• Join equal groups

• Separate unlike groups

Multiple Choice

Factors

• numbers being pulled apart

• a variable

• an equation

• numbers being multiplied

Multiple Choice

Product

• imported goods

• toys

• equation

• answer

Multiple Choice

Equation

• excludes equal sign and product

• includes equal sign and product

Estimate

Key word: about

Types: round, compatible numbers, front-end estimation

Multiple Choice

Estimate:

4,350 ÷ 54 =

• 4,000 ÷ 54 =

• 4,300 ÷ 5 =

• 4,000 ÷ 50 =

• 4,500 ÷ 55 =

Multiple Choice

Estimate:

279 ÷ 92

• 200 ÷ 90

• 270 ÷ 9

• 200 ÷ 100

• 300 ÷ 90

Multiple Choice

Estimate:

8,830 ÷ 97 =

• 8,100 ÷ 90 =

• 9,000 ÷ 90 =

• 8,800 ÷ 11 =

• 8,000 ÷ 8 =

Multiple Choice

Solve:

2,560 ÷ 32 estimates to

2,400 ÷ 30 = ___

• 50

• 800

• 8

• 80

Multiple Choice

Solve:

3,122 ÷ 85 estimates to

3,200 ÷ 80 = _____

• 4

• 5

• 40

• 500

Multiple Choice

Solve:

342 ÷ 6 estimates to

360 ÷ 6 = ____

• 6

• 60

• 600

• 70