Colorado CMAS · Math · Grade 3
Build Grade 3 Math readiness with five focused 10-question practice sets covering numbers, operations, multiplication, fractions, measurement, data, and geometry.
This Colorado CMAS Grade 3 Math Practice Test page provides five short practice sets with 10 original multiple-choice questions each. The sets offer supplemental practice across place value, operations, multiplication, division, fractions, measurement, data, area, and geometry.
Complete one 10-question set at a time. Identify the operation or model, solve carefully, and review every explanation before moving to the next set.
This is supplemental State Test Practice, State Assessment Practice, and Standardized Test Practice. It does not replace current Colorado Department of Education guidance, official CMAS blueprints, accommodations, or testing policies.
For the Colorado assessment hub, visit Colorado State Assessments.
2. Test
A 10-question Colorado CMAS Grade 3 Math practice set on addition, subtraction, and problem solving, with answers and explanations.
Read each math task carefully, choose one answer, and review the explanation after responding.
Please select an answer first.
Correct answer: A
The correct answer is 633.
Add ones, tens, and hundreds: 347 + 286 = 633.
Please select an answer first.
Correct answer: B
The correct answer is 547.
Subtracting 257 from 804 gives 547.
Please select an answer first.
Correct answer: C
The correct answer is 402.
Add the two groups: 238 + 164 = 402 books.
Please select an answer first.
Correct answer: D
The correct answer is 337.
Subtract the apples sold from the apples picked: 615 − 278 = 337.
Please select an answer first.
Correct answer: A
The correct answer is 600.
398 is about 400 and 205 is about 200, so the sum is about 600.
Please select an answer first.
Correct answer: B
The correct answer is 325.
The missing number is 725 − 400 = 325.
Please select an answer first.
Correct answer: C
The correct answer is 335.
Add 146 and 189 to get 335 cans.
Please select an answer first.
Correct answer: D
The correct answer is 432.
Subtracting 468 from 900 gives 432.
Please select an answer first.
Correct answer: A
The correct answer is 45.
First subtract 18, then add 11: 52 − 18 + 11 = 45.
Please select an answer first.
Correct answer: B
The correct answer is 275 + 126 = 401.
The word in all indicates addition: 275 + 126 = 401.
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Use focused study intervals to work through your next practice set.
The page covers place value, operations, multiplication, division, fractions, measurement, data, area, geometry, and mathematical reasoning.
There are five practice sets with 10 questions each, for 50 questions in total. Each set can be completed separately.
No. These are original supplemental practice questions. Check the latest Colorado Department of Education information for official materials, standards, accommodations, and policies.
