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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 279 · 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. 1.73 × 4 =
  2. 2.40 × 8 =
  3. 3.25 × 4 =
  4. 4.23 × 4 =
  5. 5.28 × 4 =
  6. 6.70 × 4 =
  7. 7.64 × 4 =
  8. 8.13 × 8 =
  9. 9.27 × 8 =
  10. 10.22 × 8 =
  11. 11.32 × 8 =
  12. 12.29 × 8 =
  13. 13.34 × 8 =
  14. 14.31 × 8 =
  15. 15.33 × 8 =
  16. 16.40 × 4 =
  17. 17.31 × 4 =
  18. 18.34 × 4 =
  19. 19.23 × 8 =
  20. 20.59 × 4 =
  21. 21.27 × 4 =
  22. 22.35 × 8 =
  23. 23.16 × 8 =
  24. 24.39 × 4 =
  25. 25.20 × 8 =
  26. 26.30 × 4 =
  27. 27.69 × 4 =
  28. 28.35 × 4 =
  29. 29.74 × 4 =
  30. 30.15 × 8 =
  31. 31.21 × 8 =
  32. 32.32 × 4 =
  33. 33.15 × 4 =
  34. 34.20 × 4 =
  35. 35.57 × 4 =
  36. 36.30 × 8 =
  37. 37.38 × 8 =
  38. 38.18 × 4 =
  39. 39.68 × 4 =
  40. 40.12 × 8 =

Answer key

  1. 292
  2. 320
  3. 100
  4. 92
  5. 112
  6. 280
  7. 256
  8. 104
  9. 216
  10. 176
  11. 256
  12. 232
  13. 272
  14. 248
  15. 264
  16. 160
  17. 124
  18. 136
  19. 184
  20. 236
  21. 108
  22. 280
  23. 128
  24. 156
  25. 160
  26. 120
  27. 276
  28. 140
  29. 296
  30. 120
  31. 168
  32. 128
  33. 60
  34. 80
  35. 228
  36. 240
  37. 304
  38. 72
  39. 272
  40. 96

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