# Unit 5: Arithmetic in base ten

## Lesson 1: Using decimals in a shopping context

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Adding & subtracting decimals word problemsGet 3 of 4 questions to level up!
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## Lesson 2: Using diagrams to represent addition and subtraction

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Add decimals visuallyGet 5 of 7 questions to level up!
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Subtract decimals visuallyGet 5 of 7 questions to level up!
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## Lesson 4: Adding and subtracting decimals with many non-zero digits

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Adding decimals: thousandthsGet 5 of 7 questions to level up!
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Subtracting decimals: thousandthsGet 5 of 7 questions to level up!
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#### Quiz 1

Level up on the above skills and collect up to 500 Mastery points

## Lesson 6: Methods for multiplying decimals

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Multiply decimals and whole numbers visuallyGet 5 of 7 questions to level up!
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## Lesson 8: Calculating products of decimals

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#### Quiz 2

Level up on the above skills and collect up to 400 Mastery points

## Lesson 10: Using long division

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Division by 2-digitsGet 3 of 4 questions to level up!
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Multi-digit divisionGet 3 of 4 questions to level up!
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## Lesson 13: Dividing decimals by decimals

Practice
Divide decimals by whole numbers visuallyGet 3 of 4 questions to level up!
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Dividing decimals: hundredthsGet 3 of 4 questions to level up!
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Dividing decimals: thousandthsGet 3 of 4 questions to level up!
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#### Quiz 3

Level up on the above skills and collect up to 600 Mastery points
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#### Unit test

Level up on all the skills in this unit and collect up to 1500 Mastery points!