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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 559 · 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. 1.33 × 8 =
  2. 2.32 × 8 =
  3. 3.29 × 4 =
  4. 4.17 × 8 =
  5. 5.51 × 4 =
  6. 6.34 × 8 =
  7. 7.27 × 8 =
  8. 8.12 × 4 =
  9. 9.70 × 4 =
  10. 10.12 × 8 =
  11. 11.27 × 4 =
  12. 12.20 × 4 =
  13. 13.15 × 8 =
  14. 14.21 × 8 =
  15. 15.40 × 8 =
  16. 16.30 × 4 =
  17. 17.60 × 4 =
  18. 18.25 × 8 =
  19. 19.28 × 4 =
  20. 20.73 × 4 =
  21. 21.18 × 8 =
  22. 22.13 × 4 =
  23. 23.31 × 4 =
  24. 24.35 × 4 =
  25. 25.39 × 8 =
  26. 26.15 × 4 =
  27. 27.14 × 8 =
  28. 28.28 × 8 =
  29. 29.62 × 4 =
  30. 30.25 × 4 =
  31. 31.64 × 4 =
  32. 32.19 × 4 =
  33. 33.36 × 8 =
  34. 34.29 × 8 =
  35. 35.74 × 4 =
  36. 36.56 × 4 =
  37. 37.65 × 4 =
  38. 38.19 × 8 =
  39. 39.23 × 4 =
  40. 40.24 × 8 =

Answer key

  1. 264
  2. 256
  3. 116
  4. 136
  5. 204
  6. 272
  7. 216
  8. 48
  9. 280
  10. 96
  11. 108
  12. 80
  13. 120
  14. 168
  15. 320
  16. 120
  17. 240
  18. 200
  19. 112
  20. 292
  21. 144
  22. 52
  23. 124
  24. 140
  25. 312
  26. 60
  27. 112
  28. 224
  29. 248
  30. 100
  31. 256
  32. 76
  33. 288
  34. 232
  35. 296
  36. 224
  37. 260
  38. 152
  39. 92
  40. 192

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