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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 520 · 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. 1.39 × 8 =
  2. 2.16 × 4 =
  3. 3.12 × 8 =
  4. 4.41 × 4 =
  5. 5.25 × 8 =
  6. 6.37 × 8 =
  7. 7.46 × 4 =
  8. 8.30 × 8 =
  9. 9.66 × 4 =
  10. 10.35 × 4 =
  11. 11.40 × 8 =
  12. 12.19 × 8 =
  13. 13.17 × 8 =
  14. 14.54 × 4 =
  15. 15.15 × 8 =
  16. 16.38 × 4 =
  17. 17.27 × 8 =
  18. 18.48 × 4 =
  19. 19.55 × 4 =
  20. 20.57 × 4 =
  21. 21.58 × 4 =
  22. 22.25 × 4 =
  23. 23.28 × 8 =
  24. 24.38 × 8 =
  25. 25.18 × 8 =
  26. 26.62 × 4 =
  27. 27.30 × 4 =
  28. 28.23 × 4 =
  29. 29.13 × 8 =
  30. 30.15 × 4 =
  31. 31.33 × 8 =
  32. 32.27 × 4 =
  33. 33.20 × 8 =
  34. 34.61 × 4 =
  35. 35.50 × 4 =
  36. 36.31 × 4 =
  37. 37.14 × 8 =
  38. 38.22 × 8 =
  39. 39.34 × 8 =
  40. 40.35 × 8 =

Answer key

  1. 312
  2. 64
  3. 96
  4. 164
  5. 200
  6. 296
  7. 184
  8. 240
  9. 264
  10. 140
  11. 320
  12. 152
  13. 136
  14. 216
  15. 120
  16. 152
  17. 216
  18. 192
  19. 220
  20. 228
  21. 232
  22. 100
  23. 224
  24. 304
  25. 144
  26. 248
  27. 120
  28. 92
  29. 104
  30. 60
  31. 264
  32. 108
  33. 160
  34. 244
  35. 200
  36. 124
  37. 112
  38. 176
  39. 272
  40. 280

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