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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 704 · 40 questions
TalentJR

How to do it in your head (Double, double, double): × 2: double once. × 4: double, then double again. × 8: double three times.

NameDateTime takenScore ___ / 40
  1. 1.54 × 4 =
  2. 2.64 × 4 =
  3. 3.22 × 8 =
  4. 4.26 × 4 =
  5. 5.18 × 4 =
  6. 6.17 × 8 =
  7. 7.20 × 8 =
  8. 8.25 × 8 =
  9. 9.43 × 4 =
  10. 10.24 × 8 =
  11. 11.44 × 4 =
  12. 12.35 × 4 =
  13. 13.56 × 4 =
  14. 14.28 × 8 =
  15. 15.15 × 8 =
  16. 16.13 × 8 =
  17. 17.74 × 4 =
  18. 18.61 × 4 =
  19. 19.37 × 8 =
  20. 20.26 × 8 =
  21. 21.59 × 4 =
  22. 22.38 × 8 =
  23. 23.35 × 8 =
  24. 24.19 × 8 =
  25. 25.40 × 4 =
  26. 26.68 × 4 =
  27. 27.30 × 8 =
  28. 28.22 × 4 =
  29. 29.41 × 4 =
  30. 30.13 × 4 =
  31. 31.65 × 4 =
  32. 32.14 × 4 =
  33. 33.52 × 4 =
  34. 34.12 × 8 =
  35. 35.15 × 4 =
  36. 36.36 × 4 =
  37. 37.38 × 4 =
  38. 38.24 × 4 =
  39. 39.16 × 4 =
  40. 40.50 × 4 =

Answer key

  1. 216
  2. 256
  3. 176
  4. 104
  5. 72
  6. 136
  7. 160
  8. 200
  9. 172
  10. 192
  11. 176
  12. 140
  13. 224
  14. 224
  15. 120
  16. 104
  17. 296
  18. 244
  19. 296
  20. 208
  21. 236
  22. 304
  23. 280
  24. 152
  25. 160
  26. 272
  27. 240
  28. 88
  29. 164
  30. 52
  31. 260
  32. 56
  33. 208
  34. 96
  35. 60
  36. 144
  37. 152
  38. 96
  39. 64
  40. 200

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