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# Unit 1: Addition and subtraction

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## About this unit

Let's begin our journey together in 5th grade with good ole fashioned arithmetic. Don't assume that this has to be boring...not at all! We're going to have fun as we learn about and practice adding, subtracting, multiplying, and dividing whole numbers and decimals. We know you're probably pretty comfortable with basic arithmetic, so we'll try to challenge you a little more in these tutorials!

### Practice

- Write common decimals as fractionsGet 5 of 7 questions to level up!

### Learn

### Practice

- Estimating with adding decimalsGet 5 of 7 questions to level up!
- Add decimals visuallyGet 5 of 7 questions to level up!
- Adding decimals < 1 (tenths)Get 3 of 4 questions to level up!
- Adding decimals and whole numbers (tenths)Get 3 of 4 questions to level up!
- Adding decimals (tenths)Get 3 of 4 questions to level up!

### Learn

### Practice

- Adding decimals < 1 (hundredths)Get 3 of 4 questions to level up!
- Adding decimals and whole numbers (hundredths)Get 3 of 4 questions to level up!
- Adding decimals (hundredths)Get 3 of 4 questions to level up!

Level up on the above skills and collect up to 720 Mastery points

### Learn

### Practice

- Estimating with subtracting decimalsGet 5 of 7 questions to level up!
- Subtract decimals visuallyGet 5 of 7 questions to level up!
- Subtract decimals < 1 (tenths)Get 3 of 4 questions to level up!
- Subtracting decimals (tenths)Get 3 of 4 questions to level up!
- Subtracting decimals and whole numbers (tenths)Get 3 of 4 questions to level up!
- Subtract decimals like 56.8-17.9Get 3 of 4 questions to level up!

### Learn

### Practice

- Subtract decimals < 1 (hundredths)Get 3 of 4 questions to level up!
- Subtract decimals (hundredths)Get 3 of 4 questions to level up!
- Subtract decimals like 67.89-6Get 3 of 4 questions to level up!
- Subtract decimals and whole numbers (hundredths)Get 3 of 4 questions to level up!

Level up on the above skills and collect up to 800 Mastery points

Up next for you:

Level up on all the skills in this unit and collect up to 1,900 Mastery points!