30 free lessons · Worked examples and practice
Grade 2 math
Connect place value to calculation and use equal groups, measurement, and simple data to organize everyday questions. Pictures and spoken explanations remain part of the mathematics.
Your study guide
What you will explore.
- Use place value in addition and subtraction
- Explore groups, arrays, time, and money
- Compare measurements and read simple data
Before you begin
Review counting, comparing numbers, and simple addition and subtraction. A number line or a drawing can help when a calculation feels too large to hold in your head.
Review Grade 1How to study these lessons
Make a quick sketch before calculating. Explain how tens and ones, equal groups, or a measurement unit help you organize the problem.
Work at your own pace. Open a hint when you need it, then try again before revealing the complete explanation.
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750 guided practice chapters for Grade 2.
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Your Grade 2 lesson collection.
The lessons appear in their suggested study order. Choose the first lesson for a starting point, or use the search and subject filters to review a particular skill. Read the prerequisites whenever you change topics.
Showing 12 of 30 matching lessons · All free
AlgebraGrade 2 · Foundations 6 min
Bundle ten tens into a hundred
Represent three-digit numbers with hundreds, tens, and ones.
Read, practice, and reflectAlgebraGrade 2 · Foundations 6 min
Write a number in expanded form
Explain zero as a placeholder in a three-digit number.
Read, practice, and reflectAlgebraGrade 2 · Foundations 6 min
Compare three-digit numbers
Compare numbers at their first different place.
Read, practice, and reflectAlgebraGrade 2 · Foundations 6 min
Find positions on a hundred line
Locate a number between labeled tens on an equally spaced number line.
Read, practice, and reflectAlgebraGrade 2 · Foundations 6 min
Count by twos and fives
Choose a skip count that matches a repeated group size.
Read, practice, and reflectAlgebraGrade 2 · Foundations 6 min
Make pairs to test even and odd
Classify whole numbers by whether every object can be paired.
Read, practice, and reflectAlgebraGrade 2 · Foundations 6 min
Add hundreds, tens, and ones
Add multi-digit numbers by matching place values without regrouping.
Read, practice, and reflectAlgebraGrade 2 · Foundations 6 min
Trade ten ones when adding
Regroup ten ones as one ten in two-digit addition.
Read, practice, and reflectAlgebraGrade 2 · Foundations 6 min
Subtract matching place values
Subtract by hundreds, tens, and ones when no trade is needed.
Read, practice, and reflectAlgebraGrade 2 · Foundations 6 min
Exchange a ten to subtract
Rename a ten as ten ones before subtracting.
Read, practice, and reflectAlgebraGrade 2 · Foundations 6 min
Make an easier sum by moving one
Keep a sum unchanged while moving an amount between addends.
Read, practice, and reflectAlgebraGrade 2 · Foundations 6 min
Estimate with the nearest ten
Round a whole number to the closest multiple of ten.
Read, practice, and reflect