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Grade 4 Doubles and Halves Worksheets

Double a number, halve a number, then work backwards from the answer.

Every sheet below is generated fresh with a matching answer key. Pick one of the three levels, preview it, and print or download the PDF — no account, no watermark. For the other grade 4 mental maths skills, see all mental maths worksheets.

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Mental Maths · Grade 4

Grade
Topic
SkillEach skill is a different kind of question, with its own levels.
Level
Questions
30

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Grade 4 · 2 pages · A4

Mental Maths Practice

Grade 4 • Doubles and Halves • Halve it
Name:Date:

Halve each number in your head. No calculator.

  1. 1) Half of 42 =
  2. 2) Half of 282 =
  3. 3) Half of 272 =
  1. 4) Half of 134 =
  2. 5) Half of 58 =
  3. 6) Half of 388 =
  1. 7) Half of 294 =
  2. 8) Half of 126 =
  3. 9) Half of 280 =
  1. 10) Half of 130 =
  2. 11) Half of 380 =
  3. 12) Half of 322 =
  1. 13) Half of 390 =
  2. 14) Half of 166 =
  3. 15) Half of 68 =
  1. 16) Half of 244 =
  2. 17) Half of 162 =
  3. 18) Half of 382 =
  1. 19) Half of 224 =
  2. 20) Half of 124 =
  3. 21) Half of 172 =
  1. 22) Half of 338 =
  2. 23) Half of 62 =
  3. 24) Half of 52 =
  1. 25) Half of 152 =
  2. 26) Half of 86 =
  3. 27) Half of 100 =
  1. 28) Half of 306 =
  2. 29) Half of 80 =
  3. 30) Half of 366 =
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Page 1 of 2

Answer Key

  1. 1. 21
  2. 2. 141
  3. 3. 136
  4. 4. 67
  1. 5. 29
  2. 6. 194
  3. 7. 147
  4. 8. 63
  1. 9. 140
  2. 10. 65
  3. 11. 190
  4. 12. 161
  1. 13. 195
  2. 14. 83
  3. 15. 34
  4. 16. 122
  1. 17. 81
  2. 18. 191
  3. 19. 112
  4. 20. 62
  1. 21. 86
  2. 22. 169
  3. 23. 31
  4. 24. 26
  1. 25. 76
  2. 26. 43
  3. 27. 50
  4. 28. 153
  1. 29. 40
  2. 30. 183
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Page 2 of 2

What each level generates

Grade 4 doubles and halves — the exact skill behind each difficulty setting, straight from the generator.

  1. Level 1Double it
  2. Level 2Halve it
  3. Level 3Undo a double or a half

Grade levels follow the progression common to most English-language curricula — not one specific national curriculum. Every level shows exactly what it generates, so you can check the fit with your own program. See the full scope & sequence →

More Grade 4 mental maths skills

Each one generates a different kind of question, with its own three levels and answer key.

Frequently asked questions

▸What mental maths should a Grade 4 student know?

All four operations: multiplication and division facts to 12, addition and subtraction of two- and three-digit numbers, and scaling facts by 10 and 100 — for example 47 × 10 or 800 ÷ 100. Seven separate skills cover them here, and Mixed Chains is the one that puts more than one operation on a line.

▸Do any of the divisions leave a remainder?

Only on one level. The middle level of Division Facts is built from a quotient and a remainder and answers like 7 R 5. Everywhere else the dividend is built by multiplying the answer by the divisor, so the result is an exact whole number and the focus stays on recall speed.

▸What does the Multiply by 10 and 100 skill cover?

Shifting the digits: level 1 multiplies by ten, level 2 by a hundred, and level 3 divides by both — 47 × 10, 47 × 100, 470 ÷ 10, 800 ÷ 100. It drills the place-value scaling habit that turns a known fact into a bigger one without extra work.

▸How do I reuse the same worksheet later?

The link in your address bar encodes the skill, level, count and shuffle, so opening it again rebuilds the identical sheet and the identical answer key. Bookmark it for a fair re-test, or press Shuffle for a fresh set at the same skill and level.