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4th Math: Number & Operations Base Ten practice questions and exam guide

150 multiple-choice questions, 75 flashcards and 10 scenario simulations, written to the Common Core State Standards blueprint. Every question carries a full rationale.

Last reviewed 2026-10-26 · CoStudy · how we write and review questions

  • 235 total items
  • 150 multiple choice
  • 75 flashcards
  • 10 simulations

Study 4th Math: Number & Operations Base Ten in CoStudy →

About the 4th Math: Number & Operations Base Ten exam

Common Core State Standards (CCSS) — Mathematics, Grade 4: Number & Operations in Base Ten (4.NBT.A.1-3, 4.NBT.B.4-6). Public standards from corestandards.org.

CoStudy's 4th Math: Number & Operations Base Ten bank holds 235 items. Every multiple-choice question carries a written rationale explaining why the correct answer is correct and why each distractor is tempting but wrong, and the bank includes 10 scenario-based simulations.

Free 4th Math: Number & Operations Base Ten practice questions

A sample of 12 multiple-choice questions from the bank, with the full rationale shown.

Write 'six thousand three hundred forty-five' in standard form.

  1. 6,543
  2. 6,435
  3. 6,453
  4. 6,345

Answer: D — 6,345

6,000 + 300 + 40 + 5 = 6,345. (B),(C),(A) wrong order.

Which number equals 30,000 + 4,000 + 200 + 5?

  1. 342,005
  2. 34,025
  3. 3,425
  4. 34,205

Answer: D — 34,205

D) Correct. B) tens vs hundreds swapped. C) missing 10k. A) extra place.

100,000 − 1 = ?

  1. 90,999
  2. 99,990
  3. 100,000
  4. 99,999

Answer: D — 99,999

D) Correct. B/C/A) wrong.

864 ÷ 4 = ?

  1. 260
  2. 214
  3. 226
  4. 216

Answer: D — 216

D) Correct. B/C/A) miscount.

5,400 ÷ 6 = ?

  1. 900
  2. 800
  3. 90
  4. 1,000

Answer: A — 900

A) Correct. B/C/D) miscount.

850 cookies are packed in 6 boxes equally. How many per box?

  1. 141
  2. 141 r 4
  3. 142
  4. 140 r 10

Answer: B — 141 r 4

6 × 141 = 846, remainder 4. (A) drops remainder; (C),(D) wrong.

A city's population changed from 254,876 to 289,013. Increase?

  1. 34,237
  2. 35,137
  3. 33,137
  4. 34,137

Answer: D — 34,137

D) Correct. B/C/A) miscount.

2,340 ÷ 4 = ?

  1. 585
  2. 575
  3. 595
  4. 580

Answer: A — 585

A) Correct. B/C/D) miscount.

567 ÷ 7. Quotient and remainder?

  1. 81 r 0
  2. 80 r 7
  3. 81 r 5
  4. 80 r 0

Answer: A — 81 r 0

7 × 81 = 567 exactly. (B),(C),(D) wrong.

Round 78,499 to nearest thousand.

  1. 80,000
  2. 79,000
  3. 78,000
  4. 77,000

Answer: C — 78,000

C) Correct — 499 < 500. B) rounded up. C/D) wrong place.

780 ÷ 5 = ?

  1. 155
  2. 146
  3. 166
  4. 156

Answer: D — 156

D) Correct. B/C/A) miscount.

9,001 − 4,678 = ?

  1. 5,323
  2. 4,423
  3. 4,223
  4. 4,323

Answer: D — 4,323

D) Correct. B/C/A) miscount.

4th Math: Number & Operations Base Ten flashcards

6 sample cards from the 75 in the bank.

What is 50 × 60?

3,000.

What is 12,345 + 8,765?

21,110.

What does '10 times' mean for place value?

Each place is 10 times the place to its right. The 4 in 4,000 is 10× the 4 in 400.

What is 12 × 1000?

12,000.

Round 67,892 to the nearest ten-thousand.

70,000. (Thousands digit 7 → round up.)

Word: 432 candies split into 9 equal bags. How many per bag?

48. 432 ÷ 9 = 48.

Practise the full 4th Math: Number & Operations Base Ten bank

These samples are a small slice. The full bank runs flashcards, multiple choice and timed mock exams with per-chapter progress tracking, on the web and in the iOS app.

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4th Math: Number & Operations Base Ten — frequently asked

What is the 4th Math: Number & Operations Base Ten exam?

Common Core State Standards (CCSS) — Mathematics, Grade 4: Number & Operations in Base Ten (4.NBT.A.1-3, 4.NBT.B.4-6). Public standards from corestandards.org.

How is CoStudy’s 4th Math: Number & Operations Base Ten bank organised?

It holds 235 items (150 multiple-choice, 75 flashcards, 10 simulations). Free samples on this page include the full rationale, with no account.

Does CoStudy replace the certifying body?

No. the certifying body owns the outline, the badge, and the sitting rules. This is independent practice with written rationales. We do not sell live items and we do not guarantee a pass.

Where do 4th Math: Number & Operations Base Ten fees, cut scores, and pass rates live?

On the certifying body’s site. CoStudy will not invent a sitting fee or a pass rate. If a table on this page lacks a citation, treat it as unverified.

Are these real 4th Math: Number & Operations Base Ten exam questions?

No. CoStudy does not have live items. The samples below are original practice written to the published outline, with rationales. Anyone selling “real exam dumps” is describing something you should not buy.

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