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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 802 · 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. 1.18 × 8 =
  2. 2.31 × 8 =
  3. 3.38 × 8 =
  4. 4.29 × 8 =
  5. 5.15 × 8 =
  6. 6.39 × 8 =
  7. 7.24 × 4 =
  8. 8.25 × 4 =
  9. 9.71 × 4 =
  10. 10.43 × 4 =
  11. 11.40 × 8 =
  12. 12.53 × 4 =
  13. 13.19 × 4 =
  14. 14.66 × 4 =
  15. 15.34 × 4 =
  16. 16.42 × 4 =
  17. 17.37 × 8 =
  18. 18.65 × 4 =
  19. 19.46 × 4 =
  20. 20.16 × 8 =
  21. 21.12 × 8 =
  22. 22.16 × 4 =
  23. 23.33 × 8 =
  24. 24.13 × 8 =
  25. 25.30 × 4 =
  26. 26.20 × 4 =
  27. 27.12 × 4 =
  28. 28.47 × 4 =
  29. 29.60 × 4 =
  30. 30.68 × 4 =
  31. 31.74 × 4 =
  32. 32.17 × 8 =
  33. 33.41 × 4 =
  34. 34.32 × 8 =
  35. 35.28 × 4 =
  36. 36.14 × 8 =
  37. 37.21 × 8 =
  38. 38.22 × 4 =
  39. 39.32 × 4 =
  40. 40.26 × 4 =

Answer key

  1. 144
  2. 248
  3. 304
  4. 232
  5. 120
  6. 312
  7. 96
  8. 100
  9. 284
  10. 172
  11. 320
  12. 212
  13. 76
  14. 264
  15. 136
  16. 168
  17. 296
  18. 260
  19. 184
  20. 128
  21. 96
  22. 64
  23. 264
  24. 104
  25. 120
  26. 80
  27. 48
  28. 188
  29. 240
  30. 272
  31. 296
  32. 136
  33. 164
  34. 256
  35. 112
  36. 112
  37. 168
  38. 88
  39. 128
  40. 104

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