Multiplication and Estimation Concepts

Miss Hardison reviews multiplication concepts with fourth graders, preparing them for an upcoming assessment. The lesson covers mental math strategies, cost estimation using rounding and compatible numbers, and checking multiplication answers. Students practice using partial products and models, identify errors, and complete an exit ticket for additional practice.

What is the main focus of the unit assessment mentioned in the introduction?

• Fractions

• Division

• Addition and Subtraction

• Multiplication

How should students show their work for the assessment?

• On a computer

• On pencil and paper

• Verbally

• Using a calculator

What is the mental math trick mentioned for multiplying 40 by 50?

• Divide the numbers

• Drop the zeros and multiply the remaining numbers

• Subtract the numbers

• Add the numbers

What is the product of 40 times 50 using mental math?

• 5000

• 4000

• 2000

• 200

When estimating the cost of a field trip, what is the rule of thumb for rounding?

• Round to the nearest ten

• Round to the nearest whole number

• Round to the nearest hundred

• Round to the highest place value

What is the estimated total cost of the field trip using rounded numbers?

• $600

• $800

• $700

• $500

What are compatible numbers in estimation?

• Numbers that are exactly the same

• Numbers that are easy to work with

• Numbers that are far apart

• Numbers that are close to each other

Which estimate is better for planning a field trip budget?

• Underestimate the cost

• Random estimate

• Exact cost

• Overestimate the cost

What is the correct answer for 35 times 10?

• 450

• 400

• 300

• 350

Is 19 times 20 equal to 380?

• Not enough information

• Maybe

• No

• Yes