Long Division Concepts and Techniques

The video tutorial provides a comprehensive guide on solving long division problems, highlighting common mistakes and offering tips to avoid them. It introduces the 'DiM SuB' method to remember the steps: divide, multiply, subtract, and bring down. The tutorial includes a detailed example of dividing 145 by 8, explaining each step and emphasizing the importance of multiplication tables. It concludes with memory tricks to aid learning and encourages practice for mastery.

What is a common reason students make mistakes in long division?

• They don't know how to add.

• They use the wrong multiplication table.

• They forget to bring down the next digit.

• They get confused about the order of steps.

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CCSS.7.EE.B.3

What does the mnemonic 'DiM SuB' help you remember?

• The properties of subtraction.

• The rules of multiplication.

• The steps in a division cycle.

• The order of operations in addition.

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CCSS.5.NBT.B.7

Which property allows you to switch the order of factors in multiplication?

• Commutative property

• Identity property

• Associative property

• Distributive property

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What is the first step in solving a long division problem?

• Subtract

• Multiply

• Divide

• Bring down

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How do you express a remainder as a decimal in long division?

• Multiply the remainder by 10.

• Ignore the remainder.

• Add a decimal point and continue dividing.

• Subtract the remainder from the dividend.

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CCSS.5.NBT.B.6

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What should you do if the divisor is larger than the first digit of the dividend?

• Add a zero to the dividend.

• Multiply the divisor by 10.

• Subtract the divisor from the dividend.

• Include the next digit of the dividend.

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Why is it important to line up the ones place in your calculations?

• To ensure the numbers are in the correct columns.

• To avoid using a calculator.

• To make the division faster.

• To simplify the multiplication table.

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What is the quotient when dividing 145 by 8?

• 19.125

• 16.125

• 17.125

• 18.125

What is the remainder expressed as a decimal when dividing 145 by 8?

• 0.125

• 0.25

• 0.5

• 0.75

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CCSS.5.NBT.B.6

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What is emphasized as crucial for mastering long division?

• Knowing multiplication tables

• Practicing addition

• Memorizing subtraction rules

• Using a calculator

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