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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 865 · 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. 1.18 × 8 =
  2. 2.13 × 8 =
  3. 3.17 × 8 =
  4. 4.16 × 8 =
  5. 5.37 × 8 =
  6. 6.32 × 8 =
  7. 7.38 × 8 =
  8. 8.25 × 4 =
  9. 9.19 × 4 =
  10. 10.21 × 4 =
  11. 11.73 × 4 =
  12. 12.51 × 4 =
  13. 13.62 × 4 =
  14. 14.20 × 8 =
  15. 15.56 × 4 =
  16. 16.55 × 4 =
  17. 17.28 × 8 =
  18. 18.15 × 8 =
  19. 19.14 × 4 =
  20. 20.23 × 4 =
  21. 21.53 × 4 =
  22. 22.27 × 8 =
  23. 23.36 × 8 =
  24. 24.17 × 4 =
  25. 25.31 × 8 =
  26. 26.61 × 4 =
  27. 27.58 × 4 =
  28. 28.64 × 4 =
  29. 29.26 × 4 =
  30. 30.29 × 8 =
  31. 31.36 × 4 =
  32. 32.42 × 4 =
  33. 33.20 × 4 =
  34. 34.21 × 8 =
  35. 35.19 × 8 =
  36. 36.40 × 8 =
  37. 37.39 × 8 =
  38. 38.31 × 4 =
  39. 39.24 × 8 =
  40. 40.66 × 4 =

Answer key

  1. 144
  2. 104
  3. 136
  4. 128
  5. 296
  6. 256
  7. 304
  8. 100
  9. 76
  10. 84
  11. 292
  12. 204
  13. 248
  14. 160
  15. 224
  16. 220
  17. 224
  18. 120
  19. 56
  20. 92
  21. 212
  22. 216
  23. 288
  24. 68
  25. 248
  26. 244
  27. 232
  28. 256
  29. 104
  30. 232
  31. 144
  32. 168
  33. 80
  34. 168
  35. 152
  36. 320
  37. 312
  38. 124
  39. 192
  40. 264

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