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3rd Grade U.S.

The 3rd grade (U.S.) dashboard.

The 3rd Grade (U.S.) Math Mission is a set of skills on Khan Academy. This mission consists of practicing operations on integers, introducing and practicing fractions, extending measurement and geometric knowledge, and beginning treatment of arithmetic properties.

Mission Specifics

Mission Foundations

  1. Filling rectangles with same-sized squares
  2. Equal parts of circles and rectangles
  3. Measuring lengths with different units
  4. Addition within 20
  5. Subtraction within 20
  6. Comparing three-digit numbers

Addition and subtraction

  1. 3rd grade warmup (part 1)
  2. Addition within 1000
  3. Subtraction within 1000
  4. Breaking apart three-digit addition problems
  5. Addition using groups of 10 and 100
  6. Adding and subtracting within 1000 using a number line
  7. Find the missing number (addition and subtraction within 1000)

Multiplication and division

  1. Meaning of division
  2. Dividing with visuals
  3. Basic division
  4. Meaning of multiplication
  5. Multiplying with arrays
  6. Multiplying 1-digit numbers
  7. Whole numbers on the number line
  8. Relate division to multiplication
  9. Relate division to multiplication word problems
  10. 1-digit division
  11. Letters and symbols in multiplication and division equations
  12. Multiplying by 0 or 1
  13. Multiplying by 2
  14. Multiplying by 3
  15. Multiplying by 4
  16. Multiplying by 5
  17. Multiplying by 6
  18. Multiplying by 7
  19. Multiplying by 8
  20. Multiplying by 9
  21. Patterns in multiplication tables
  22. Dividing by 1
  23. Dividing by 2
  24. Dividing by 3
  25. Dividing by 4
  26. Dividing by 5
  27. Dividing by 6
  28. Dividing by 7
  29. Dividing by 8
  30. Dividing by 9
  31. Dividing by 10
  32. Commutative property of multiplication
  33. Associative property of multiplication
  34. Distributive property of multiplication
  35. Multiply by tens
  36. Multiply by tens word problems
  37. Two-step word problems with addition, subtraction, multiplication, and division
  38. Math patterns 1

Fractions

  1. Cutting shapes into equal parts
  2. That's not fair!
  3. Recognizing fractions 1
  4. Recognizing fractions 2
  5. Identifying numerators and denominators
  6. Fractions on the number line
  7. Unit fractions on the number line
  8. Finding 1 on the number line
  9. Writing fractions as whole numbers
  10. Equivalent fraction models
  11. Equivalent fractions on the number line
  12. Visually comparing fractions 1
  13. Comparing fractions with the same denominator
  14. Comparing fractions with the same numerator
  15. Comparing fractions with the same numerator or denominator
  16. Comparing fractions of different wholes

Measurement and geometry

  1. Telling time to the nearest minute
  2. Time differences
  3. Telling time word problems with the number line
  4. Telling time word problems
  5. Estimating mass (grams and kilograms)
  6. Arithmetic word problems with mass
  7. Estimating volume (milliliters and liters)
  8. Arithmetic word problems with volume
  9. Creating bar charts
  10. Reading bar charts 1
  11. Reading bar charts 2
  12. Creating picture graphs
  13. Reading picture graphs 1
  14. Reading picture graphs 2
  15. Marking data on line plots
  16. Understanding area
  17. Find area by counting unit squares
  18. Measuring area with unit squares
  19. Create rectangles with a given area
  20. Transition from counting unit squares to area formula
  21. Measure to find area
  22. Area of rectangles
  23. Find a missing side length when given area of a rectangle
  24. Comparing areas by multiplying
  25. Area and the distributive property
  26. Decompose shapes to find area 1
  27. Decompose shapes to find area 2
  28. Find perimeter by counting unit squares
  29. Measure to find perimeter
  30. Find perimeter when given side lengths
  31. Find a missing side length when given perimeter
  32. Comparing area and perimeter
  33. Categorize quadrilaterals

Place value and rounding

  1. Rounding to the nearest 10 or 100
  2. Rounding to the nearest 10 or 100 on the number line
  3. Rounding challenge

Users can view other Math missions here.

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