NDSA Grade 3 Number and Operations in Base Ten. Practice it free.

Uses place value and base-ten reasoning to perform multi-digit arithmetic. This Grade 3 reporting domain maps to 3 practice skills and 8 representative questions from the playable bank.

Grade 33.NBT3 mapped skills
What the test measures

Number and Operations in Base Ten skills

  1. Use place-value understanding to round whole numbers to the nearest 10 or 100.

  2. Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.

  3. Multiply one-digit whole numbers by multiples of 10 in the range 10–90 using place-value and properties of operations.

Standards basis

North Dakota State Content Standards for Mathematics — North Dakota

How the NDSA reports it

North Dakota administered its own state assessment program (the NDSA, a Cambium computer-adaptive test in grades 3-8 and 10; replaced by ND A+ beginning spring 2025). An official NDSA mathematics public-facing CAT blueprint (Cambium/NDDPI, Oct 2020) does exist and lists per-grade reporting categories with percentage ranges, but its full per-grade table could not be retrieved character-for-character from a citable primary source for transcription here (the Cambium content CDN blocks programmatic access). The NDSA reporting categories are the CCSS-M grade-level domains: the assessment was built on North Dakota's 2017 math standards, which are verbatim CCSS-M organized by grade-level domains. The coverage map below uses North Dakota's 2023-standards-style domain/standard codes (e.g. 3.AR.OA) but the skill content is CCSS-M.

Blueprint & weighting

An official NDSA mathematics CAT blueprint (Cambium/NDDPI public-facing CAT version, Oct 2020) publishes per-grade reporting-category percentage ranges (e.g. grade 3 Operations and Algebraic Thinking ~31-34%, Number and Operations in Base Ten ~22-24%; grade 6 groups Ratios & Proportional Relationships and The Number System ~28-34% and Expressions and Equations ~25-29%). The complete per-grade table could not be retrieved verbatim from a citable primary source (the Cambium content CDN returns HTTP 403 to programmatic fetches), so domain weights in the mapping are left null rather than transcribing partial/uncertain figures or splitting blueprint percentages across the grade-6+ domain groupings.

Try it now

8 free questions · 0/0 correct

Practice playeasy

What is 45+6945 + 69?

45+69=11445 + 69 = 114.

Practice playeasy

What is 201920 - 19?

2019=120 - 19 = 1.

Practice playeasy

Round 44,02444{,}024 to the nearest hundred.

The digit one place to the right is 22, so round down: 44,02444,00044{,}024 \to 44{,}000.

Practice playeasy

What is 17+4417 + 44?

17+44=6117 + 44 = 61.

Practice playeasy

What is 807980 - 79?

8079=180 - 79 = 1.

Practice playeasy

Round 617617 to the nearest ten.

The digit one place to the right is 77, so round up: 617620617 \to 620.

Practice playeasy

What is 69+4069 + 40?

69+40=10969 + 40 = 109.

Practice playeasy

What is 312931 - 29?

3129=231 - 29 = 2.

Keep practicing

Turn number and operations in base ten into game time.

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