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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 821 · 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. 1.53 × 4 =
  2. 2.19 × 4 =
  3. 3.30 × 4 =
  4. 4.27 × 8 =
  5. 5.54 × 4 =
  6. 6.71 × 4 =
  7. 7.33 × 8 =
  8. 8.17 × 4 =
  9. 9.16 × 8 =
  10. 10.13 × 8 =
  11. 11.44 × 4 =
  12. 12.70 × 4 =
  13. 13.15 × 4 =
  14. 14.46 × 4 =
  15. 15.18 × 8 =
  16. 16.34 × 8 =
  17. 17.17 × 8 =
  18. 18.36 × 8 =
  19. 19.63 × 4 =
  20. 20.39 × 8 =
  21. 21.29 × 8 =
  22. 22.23 × 4 =
  23. 23.72 × 4 =
  24. 24.34 × 4 =
  25. 25.24 × 4 =
  26. 26.68 × 4 =
  27. 27.15 × 8 =
  28. 28.29 × 4 =
  29. 29.20 × 4 =
  30. 30.28 × 4 =
  31. 31.32 × 4 =
  32. 32.32 × 8 =
  33. 33.35 × 4 =
  34. 34.56 × 4 =
  35. 35.13 × 4 =
  36. 36.12 × 8 =
  37. 37.40 × 8 =
  38. 38.23 × 8 =
  39. 39.73 × 4 =
  40. 40.31 × 8 =

Answer key

  1. 212
  2. 76
  3. 120
  4. 216
  5. 216
  6. 284
  7. 264
  8. 68
  9. 128
  10. 104
  11. 176
  12. 280
  13. 60
  14. 184
  15. 144
  16. 272
  17. 136
  18. 288
  19. 252
  20. 312
  21. 232
  22. 92
  23. 288
  24. 136
  25. 96
  26. 272
  27. 120
  28. 116
  29. 80
  30. 112
  31. 128
  32. 256
  33. 140
  34. 224
  35. 52
  36. 96
  37. 320
  38. 184
  39. 292
  40. 248

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