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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 81 · 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. 1.39 × 8 =
  2. 2.59 × 4 =
  3. 3.33 × 8 =
  4. 4.16 × 8 =
  5. 5.72 × 4 =
  6. 6.64 × 4 =
  7. 7.24 × 4 =
  8. 8.12 × 4 =
  9. 9.40 × 4 =
  10. 10.68 × 4 =
  11. 11.28 × 4 =
  12. 12.31 × 4 =
  13. 13.69 × 4 =
  14. 14.19 × 4 =
  15. 15.26 × 8 =
  16. 16.67 × 4 =
  17. 17.15 × 8 =
  18. 18.20 × 4 =
  19. 19.13 × 4 =
  20. 20.14 × 4 =
  21. 21.12 × 8 =
  22. 22.35 × 8 =
  23. 23.36 × 8 =
  24. 24.23 × 4 =
  25. 25.53 × 4 =
  26. 26.29 × 8 =
  27. 27.18 × 8 =
  28. 28.36 × 4 =
  29. 29.56 × 4 =
  30. 30.38 × 8 =
  31. 31.65 × 4 =
  32. 32.25 × 4 =
  33. 33.60 × 4 =
  34. 34.17 × 8 =
  35. 35.51 × 4 =
  36. 36.37 × 8 =
  37. 37.73 × 4 =
  38. 38.20 × 8 =
  39. 39.48 × 4 =
  40. 40.63 × 4 =

Answer key

  1. 312
  2. 236
  3. 264
  4. 128
  5. 288
  6. 256
  7. 96
  8. 48
  9. 160
  10. 272
  11. 112
  12. 124
  13. 276
  14. 76
  15. 208
  16. 268
  17. 120
  18. 80
  19. 52
  20. 56
  21. 96
  22. 280
  23. 288
  24. 92
  25. 212
  26. 232
  27. 144
  28. 144
  29. 224
  30. 304
  31. 260
  32. 100
  33. 240
  34. 136
  35. 204
  36. 296
  37. 292
  38. 160
  39. 192
  40. 252

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