CMAS Grades 3-5 Number & Operations—Fractions. Practice it free.

Develops fraction understanding and fraction equivalence, comparison, and operations with fractions. This Grades 3-5 reporting domain maps to 2 practice skills and 8 representative questions from the playable bank.

Grades 3-5Number & Operations—Fractions2 mapped skills

What the test measures

Number & Operations—Fractions skills

Develop fraction concepts and equivalence
Compare fractions with like denominators and numerators
Add and subtract fractions with unlike denominators in grade 4
Apply and extend previous understandings of multiplication and division to multiply and divide fractions in grade 5

Standards basis

Colorado Academic Standards (mathematics) — Colorado

How the CMAS reports it

CMAS is Colorado’s statewide summative assessment system aligned to the Colorado Academic Standards rather than a national framework like SBAC or NAEP. The official CMAS page and Colorado standards materials indicate the math assessment is built from Colorado Academic Standards, but the retrieved official CMAS page did not expose a separate math blueprint document.

Blueprint & weighting

No official CMAS math domain weighting/percent-of-items blueprint was available in the retrieved primary CMAS materials.

Official sources

Colorado Department of Education CMAS page
Colorado Department of Education Colorado Academic Standards and Essential Skills page

Practice by skill

Topics mapped to this domain

Fraction equivalence and simplification

Grade 4217 questions

Adding and subtracting fractions

Grade 5210 questions

Try it now

8 free questions · 0/0 correct

Practice playeasy

Fill in: $\dfrac{1}{5} = \dfrac{\square}{25}$ .

Multiply numerator and denominator by 5: $\dfrac{1 \times 5}{5 \times 5} = \dfrac{5}{25}$ .

Practice playeasy

What is $\dfrac{3}{6} + \dfrac{2}{3}$ ?

LCD is 6: $\dfrac{3}{6} + \dfrac{4}{6} = \dfrac{7}{6}$ .

Practice playeasy

Simplify $\dfrac{20}{32}$ to lowest terms.

GCF of 20 and 32 is 4: $\dfrac{20 \div 4}{32 \div 4} = \dfrac{5}{8}$ .

Practice playeasy

What is $\dfrac{1}{2} - \dfrac{1}{5}$ ?

LCD is 10: $\dfrac{5}{10} - \dfrac{2}{10} = \dfrac{3}{10}$ .

Practice playeasy

Find the equivalent fraction: $\dfrac{5}{7} = \dfrac{?}{28}$ .

Multiply top and bottom by 4: $\dfrac{5 \times 4}{7 \times 4} = \dfrac{20}{28}$ .

Practice playeasy

What is $\dfrac{1}{2} + \dfrac{3}{4}$ ?

LCD is 4: $\dfrac{2}{4} + \dfrac{3}{4} = \dfrac{5}{4}$ .

Practice playeasy

Which fraction is equivalent to $\dfrac{2}{5}$ ?

Multiply both parts of $\dfrac{2}{5}$ by 2: $\dfrac{4}{10}$ .

Practice playeasy

What is $\dfrac{6}{8} - \dfrac{1}{3}$ ?

LCD is 24: $\dfrac{18}{24} - \dfrac{8}{24} = \dfrac{5}{12}$ .

Keep practicing

Turn number & operations—fractions into game time.

The CMAS placement starts with this test's real coverage map and finds the right difficulty.

Sprout RowPlay →

Horseshoe Toss game cover

Horseshoe TossPlay →

Related Common Core standards

4.NF.A.1 5.NF.A.1

The same skills on other tests

DC CAPE MAAP MO MAP OSTP

Source and test overview

All CMAS prep Official test source

Reporting categories

More Grades 3-5 domains

Operations & Algebraic ThinkingRepresents and solves problems involving addition and subtraction, and multiplication and division, and begins algebraic reasoning in the elementary grades.8 QsPractice →Number & Operations in Base TenUses place value and properties of operations to perform multi-digit computation and develop fluency with base-ten arithmetic.8 QsPractice →Measurement & DataDescribes measurable attributes, measures lengths, and works with data, time, money, and geometric measurement.8 QsPractice →