# 3rd grade (U.S.) Math Mission

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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

- Filling rectangles with same-sized squares
- Equal parts of circles and rectangles
- Measuring lengths with different units
- Addition within 20
- Subtraction within 20
- Comparing three-digit numbers

### Addition and subtraction

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

### Multiplication and division

- Meaning of division
- Dividing with visuals
- Basic division
- Meaning of multiplication
- Multiplying with arrays
- Multiplying 1-digit numbers
- Whole numbers on the number line
- Relate division to multiplication
- Relate division to multiplication word problems
- 1-digit division
- Letters and symbols in multiplication and division equations
- Multiplying by 0 or 1
- Multiplying by 2
- Multiplying by 3
- Multiplying by 4
- Multiplying by 5
- Multiplying by 6
- Multiplying by 7
- Multiplying by 8
- Multiplying by 9
- Patterns in multiplication tables
- Dividing by 1
- Dividing by 2
- Dividing by 3
- Dividing by 4
- Dividing by 5
- Dividing by 6
- Dividing by 7
- Dividing by 8
- Dividing by 9
- Dividing by 10
- Commutative property of multiplication
- Associative property of multiplication
- Distributive property of multiplication
- Multiply by tens
- Multiply by tens word problems
- Two-step word problems with addition, subtraction, multiplication, and division
- Math patterns 1

### Fractions

- Cutting shapes into equal parts
- That's not fair!
- Recognizing fractions 1
- Recognizing fractions 2
- Identifying numerators and denominators
- Fractions on the number line
- Unit fractions on the number line
- Finding 1 on the number line
- Writing fractions as whole numbers
- Equivalent fraction models
- Equivalent fractions on the number line
- Visually comparing fractions 1
- Comparing fractions with the same denominator
- Comparing fractions with the same numerator
- Comparing fractions with the same numerator or denominator
- Comparing fractions of different wholes

### Measurement and geometry

- Telling time to the nearest minute
- Time differences
- Telling time word problems with the number line
- Telling time word problems
- Estimating mass (grams and kilograms)
- Arithmetic word problems with mass
- Estimating volume (milliliters and liters)
- Arithmetic word problems with volume
- Creating bar charts
- Reading bar charts 1
- Reading bar charts 2
- Creating picture graphs
- Reading picture graphs 1
- Reading picture graphs 2
- Marking data on line plots
- Understanding area
- Find area by counting unit squares
- Measuring area with unit squares
- Create rectangles with a given area
- Transition from counting unit squares to area formula
- Measure to find area
- Area of rectangles
- Find a missing side length when given area of a rectangle
- Comparing areas by multiplying
- Area and the distributive property
- Decompose shapes to find area 1
- Decompose shapes to find area 2
- Find perimeter by counting unit squares
- Measure to find perimeter
- Find perimeter when given side lengths
- Find a missing side length when given perimeter
- Comparing area and perimeter
- Categorize quadrilaterals

### Place value and rounding

- Rounding to the nearest 10 or 100
- Rounding to the nearest 10 or 100 on the number line
- Rounding challenge

Users can view other Math missions here.