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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 635 · 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. 1.66 × 4 =
  2. 2.42 × 4 =
  3. 3.30 × 8 =
  4. 4.35 × 4 =
  5. 5.68 × 4 =
  6. 6.36 × 4 =
  7. 7.17 × 8 =
  8. 8.52 × 4 =
  9. 9.20 × 8 =
  10. 10.60 × 4 =
  11. 11.24 × 4 =
  12. 12.22 × 4 =
  13. 13.32 × 8 =
  14. 14.16 × 8 =
  15. 15.41 × 4 =
  16. 16.65 × 4 =
  17. 17.14 × 8 =
  18. 18.25 × 8 =
  19. 19.34 × 8 =
  20. 20.28 × 8 =
  21. 21.30 × 4 =
  22. 22.40 × 8 =
  23. 23.38 × 4 =
  24. 24.18 × 4 =
  25. 25.46 × 4 =
  26. 26.74 × 4 =
  27. 27.39 × 8 =
  28. 28.38 × 8 =
  29. 29.16 × 4 =
  30. 30.19 × 8 =
  31. 31.25 × 4 =
  32. 32.18 × 8 =
  33. 33.63 × 4 =
  34. 34.21 × 8 =
  35. 35.20 × 4 =
  36. 36.33 × 4 =
  37. 37.28 × 4 =
  38. 38.29 × 8 =
  39. 39.73 × 4 =
  40. 40.37 × 8 =

Answer key

  1. 264
  2. 168
  3. 240
  4. 140
  5. 272
  6. 144
  7. 136
  8. 208
  9. 160
  10. 240
  11. 96
  12. 88
  13. 256
  14. 128
  15. 164
  16. 260
  17. 112
  18. 200
  19. 272
  20. 224
  21. 120
  22. 320
  23. 152
  24. 72
  25. 184
  26. 296
  27. 312
  28. 304
  29. 64
  30. 152
  31. 100
  32. 144
  33. 252
  34. 168
  35. 80
  36. 132
  37. 112
  38. 232
  39. 292
  40. 296

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