Exploring Adding and Subtracting Rational Expressions

This video tutorial covers all aspects of decimal operations, including addition, subtraction, multiplication, and division. It provides detailed examples and explanations for each operation, emphasizing the importance of aligning decimal points and understanding decimal placement. The tutorial also includes mixed operations and real-world application problems to reinforce the concepts learned.

When adding or subtracting decimals, what is the most important step to ensure accuracy?

• Starting from the leftmost digit

• Aligning the decimal points

• Adding extra zeros at the end

• Ignoring the decimal points

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CCSS.5.NBT.B.7

What is the result of adding 13.9600 and 4.025?

• 17.960

• 17.985

• 18.000

• 17.9850

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CCSS.6.NS.B.3

When multiplying decimals, when should you consider the decimal points?

• At the beginning

• During the multiplication

• After completing the multiplication

• You should ignore them completely

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CCSS.5.NBT.B.7

What is the product of 1.35 and 1.7?

• 2.400

• 2.370

• 2.345

• 2.295

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CCSS.6.NS.B.3

When dividing 27 by 2.5, what is the first step?

• Move the decimal point in the dividend

• Move the decimal point in the divisor

• Add zeros to the dividend

• Divide directly

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CCSS.5.NBT.B.7

What is the result of dividing 504 by 28?

• 18

• 24

• 20

• 22

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CCSS.5.NBT.B.6

CCSS.6.NS.B.2

In mixed operations, what should you do first?

• Division

• Addition

• Subtraction

• Multiplication

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CCSS.6.EE.A.2C

What is the result of 18.1 - 4.48?

• 14.62

• 13.62

• 12.62

• 13.72

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CCSS.6.NS.B.3

If Allan ate 23.9 hot dogs in 5 minutes, how many hot dogs did he average per minute?

• 4.74

• 4.76

• 4.80

• 4.78

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CCSS.6.NS.B.3

If a cab driver charges $2.19 per mile, how much would an 8.3-mile ride cost?

• $18.24

• $18.22

• $18.20

• $18.18

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CCSS.7.EE.B.3