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Addition and subtraction

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Relating addition and subtraction
Practice
Relate addition and subtractionGet 5 of 7 questions to level up!
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Adding 7 + 6Adding 8 + 7Adding 5 + 3 + 6
Practice
Add within 20Get 5 of 7 questions to level up!
Add 3 numbersGet 5 of 7 questions to level up!
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Subtracting 14 - 6
Practice
Subtract within 20Get 5 of 7 questions to level up!
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Equal sign
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Equal signGet 5 of 7 questions to level up!
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Addition and subtraction word problems: superheroesAddition and subtraction word problems: gorillas
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Addition and subtraction word problems 1Get 5 of 7 questions to level up!
Addition and subtraction word problems 2Get 5 of 7 questions to level up!
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Comparison word problems: marblesComparison word problems: roly-polies
Practice
Word problems with "more" and "fewer" 1Get 5 of 7 questions to level up!
Word problems with "more" and "fewer" 2Get 5 of 7 questions to level up!
Learn
Adding 1 vs. adding 10Understanding place value when adding tensUnderstanding place value when adding onesAdding 1s and 10s guided practice
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!
Learn
Adding 2-digit numbers without regrouping 1Adding 2-digit numbers without regrouping 2Breaking apart 2-digit addition problemsRegrouping to add 1-digit numberAdding by making a group of 10
Practice
Add 2-digit numbers (no regrouping)Get 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!

About this unit

First, we will learn how addition and subtraction relate. Next, we will add and subtract numbers less than or equal to 20 and solve addition and subtraction word problems. Finally, we will begin adding 2-digit numbers.