Mastering Large Number Addition and Subtraction

Maria Miller from MathMammoth.com introduces adding and subtracting large numbers up to six digits. She explains the process of addition and subtraction, including carrying and borrowing, and emphasizes the importance of aligning place values. The video includes examples of borrowing over zeros and solving a word problem involving budget calculations. Maria also demonstrates how to find and correct errors in addition, using a family weight problem as an example.

What is the first step when adding two large numbers?

• Multiply the digits in the ones place

• Subtract the digits in the ones place

• Add the digits in the ones place

• Add the digits in the tens place

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When subtracting and you cannot subtract a smaller digit from a larger one, what should you do?

• Subtract the larger digit from the smaller one

• Multiply the smaller digit by 2

• Borrow from the next higher place value

• Add 10 to the smaller digit

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Why is it important to align place value units correctly when adding or subtracting?

• To avoid using a calculator

• To ensure the correct calculation

• To make the numbers look neat

• To make the numbers easier to read

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What should you do if you encounter zeros while borrowing in subtraction?

• Subtract the zeros directly

• Add 10 to the zeros

• Borrow from the next non-zero digit

• Skip the zeros

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How do you add 10,000 to a number?

• Add 1 to the ten thousands place

• Add 1 to the thousands place

• Add 10 to the thousands place

• Add 10 to the ten thousands place

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How do you check the correctness of a subtraction problem?

• By adding the result to the subtracted number

• By subtracting the result from the original number

• By multiplying the result by the subtracted number

• By dividing the result by the subtracted number

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If a library spent $345,000 last year and $23,000 more this year, how much did it spend this year?

• $370,000

• $368,000

• $345,000

• $360,000

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If the library plans to spend $35,500 less next year than this year, how much will it spend next year?

• $330,000

• $345,000

• $368,000

• $332,500

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What is the error in the addition of Matthew's family weights?

• Incorrect addition of tens place

• Incorrect addition of hundreds place

• Incorrect addition of thousands place

• Incorrect addition of ones place

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CCSS.2.NBT.B.7

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What is the final weight of Matthew's family after correcting the addition error?

• 62,000 pounds

• 63,100 pounds

• 60,000 pounds

• 65,000 pounds

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