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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 465 · 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. 1.13 × 8 =
  2. 2.51 × 4 =
  3. 3.25 × 8 =
  4. 4.18 × 4 =
  5. 5.34 × 8 =
  6. 6.14 × 8 =
  7. 7.58 × 4 =
  8. 8.59 × 4 =
  9. 9.37 × 8 =
  10. 10.29 × 8 =
  11. 11.13 × 4 =
  12. 12.40 × 8 =
  13. 13.15 × 8 =
  14. 14.61 × 4 =
  15. 15.45 × 4 =
  16. 16.32 × 8 =
  17. 17.27 × 4 =
  18. 18.28 × 4 =
  19. 19.30 × 8 =
  20. 20.12 × 8 =
  21. 21.38 × 4 =
  22. 22.41 × 4 =
  23. 23.16 × 4 =
  24. 24.24 × 8 =
  25. 25.28 × 8 =
  26. 26.69 × 4 =
  27. 27.33 × 8 =
  28. 28.62 × 4 =
  29. 29.21 × 8 =
  30. 30.73 × 4 =
  31. 31.47 × 4 =
  32. 32.39 × 8 =
  33. 33.50 × 4 =
  34. 34.70 × 4 =
  35. 35.17 × 8 =
  36. 36.52 × 4 =
  37. 37.43 × 4 =
  38. 38.36 × 4 =
  39. 39.24 × 4 =
  40. 40.66 × 4 =

Answer key

  1. 104
  2. 204
  3. 200
  4. 72
  5. 272
  6. 112
  7. 232
  8. 236
  9. 296
  10. 232
  11. 52
  12. 320
  13. 120
  14. 244
  15. 180
  16. 256
  17. 108
  18. 112
  19. 240
  20. 96
  21. 152
  22. 164
  23. 64
  24. 192
  25. 224
  26. 276
  27. 264
  28. 248
  29. 168
  30. 292
  31. 188
  32. 312
  33. 200
  34. 280
  35. 136
  36. 208
  37. 172
  38. 144
  39. 96
  40. 264

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