Curriculum placement
Grade 4. This describes the skill, not a learner estimate.
Adding and subtracting mixed numbers
Compose decompose and operate on mixed numbers with like denominators
Problem types
- Count the parts in a mixed amount
- Find full wholes in an amount
- Find the part beyond full wholes
- Subtract through a whole
- Add mixed numbers
Builds on
- Adding and subtracting like fractions
- Fractions on a number line · Useful idea
A mixed number is a point on a number line between two whole numbers, a whole part and a fraction of the next unit.
Leads to
- Adding and subtracting unlike fractions · See it applied
Adding mixed numbers adds the whole parts and the fractional parts, regrouping when the fractional sum exceeds 1.
- Multiplying fractions · See it applied
Converting a mixed number to an improper fraction lets you multiply by multiplying numerators and denominators.
Related skills
- Dividing polynomials · Related idea
An improper fraction splits into a whole number and a fraction, as a polynomial quotient splits into a quotient and a remainder over the divisor.
- Adding and subtracting from a line plot · Shared foundations
Open the interactive map to explore lessons and skill connections.