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# Unit 30: Numbers and Operations 159-175

1,400 possible mastery points

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Attempted

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Quiz

Unit test

### Practice

- Numbers to 120Get 5 of 7 questions to level up!

### Learn

### Practice

- Groups of ten objectsGet 5 of 7 questions to level up!
- Tens and onesGet 5 of 7 questions to level up!
- 2-digit place value challengeGet 5 of 7 questions to level up!

Level up on the above skills and collect up to 320 Mastery points

### Practice

- Compare 2-digit numbersGet 5 of 7 questions to level up!
- Compare 2-digit numbers 2Get 5 of 7 questions to level up!

### Learn

### Practice

- Add 1 or 10Get 5 of 7 questions to level up!
- Add 1s or 10s (no regrouping)Get 5 of 7 questions to level up!

Level up on the above skills and collect up to 320 Mastery points

### Learn

### Practice

- Add within 20 visuallyGet 5 of 7 questions to level up!
- Add within 20Get 5 of 7 questions to level up!
- Break apart 2-digit addition problemsGet 3 of 4 questions to level up!
- Regroup when adding 1-digit numbersGet 5 of 7 questions to level up!

### Learn

### Practice

- Subtract within 20 visuallyGet 5 of 7 questions to level up!
- Subtract within 20Get 5 of 7 questions to level up!

Level up on the above skills and collect up to 480 Mastery points

Level up on all the skills in this unit and collect up to 1,400 Mastery points!