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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 825 · 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. 1.15 × 4 =
  2. 2.25 × 8 =
  3. 3.30 × 4 =
  4. 4.63 × 4 =
  5. 5.17 × 4 =
  6. 6.68 × 4 =
  7. 7.48 × 4 =
  8. 8.33 × 8 =
  9. 9.27 × 8 =
  10. 10.14 × 4 =
  11. 11.35 × 8 =
  12. 12.39 × 4 =
  13. 13.24 × 8 =
  14. 14.36 × 8 =
  15. 15.13 × 4 =
  16. 16.42 × 4 =
  17. 17.14 × 8 =
  18. 18.37 × 8 =
  19. 19.64 × 4 =
  20. 20.41 × 4 =
  21. 21.40 × 8 =
  22. 22.53 × 4 =
  23. 23.24 × 4 =
  24. 24.74 × 4 =
  25. 25.70 × 4 =
  26. 26.38 × 8 =
  27. 27.57 × 4 =
  28. 28.31 × 8 =
  29. 29.32 × 8 =
  30. 30.23 × 8 =
  31. 31.62 × 4 =
  32. 32.23 × 4 =
  33. 33.19 × 8 =
  34. 34.58 × 4 =
  35. 35.34 × 8 =
  36. 36.30 × 8 =
  37. 37.13 × 8 =
  38. 38.21 × 4 =
  39. 39.51 × 4 =
  40. 40.39 × 8 =

Answer key

  1. 60
  2. 200
  3. 120
  4. 252
  5. 68
  6. 272
  7. 192
  8. 264
  9. 216
  10. 56
  11. 280
  12. 156
  13. 192
  14. 288
  15. 52
  16. 168
  17. 112
  18. 296
  19. 256
  20. 164
  21. 320
  22. 212
  23. 96
  24. 296
  25. 280
  26. 304
  27. 228
  28. 248
  29. 256
  30. 184
  31. 248
  32. 92
  33. 152
  34. 232
  35. 272
  36. 240
  37. 104
  38. 84
  39. 204
  40. 312

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