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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 204 · 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. 2.51 × 4 =
  3. 3.28 × 4 =
  4. 4.25 × 8 =
  5. 5.27 × 4 =
  6. 6.38 × 8 =
  7. 7.16 × 4 =
  8. 8.68 × 4 =
  9. 9.18 × 8 =
  10. 10.36 × 4 =
  11. 11.33 × 4 =
  12. 12.14 × 8 =
  13. 13.12 × 8 =
  14. 14.65 × 4 =
  15. 15.42 × 4 =
  16. 16.22 × 4 =
  17. 17.37 × 8 =
  18. 18.15 × 8 =
  19. 19.62 × 4 =
  20. 20.35 × 8 =
  21. 21.32 × 4 =
  22. 22.12 × 4 =
  23. 23.14 × 4 =
  24. 24.29 × 4 =
  25. 25.29 × 8 =
  26. 26.19 × 4 =
  27. 27.37 × 4 =
  28. 28.58 × 4 =
  29. 29.54 × 4 =
  30. 30.20 × 8 =
  31. 31.17 × 4 =
  32. 32.45 × 4 =
  33. 33.27 × 8 =
  34. 34.15 × 4 =
  35. 35.31 × 8 =
  36. 36.48 × 4 =
  37. 37.33 × 8 =
  38. 38.24 × 4 =
  39. 39.16 × 8 =
  40. 40.53 × 4 =

Answer key

  1. 312
  2. 204
  3. 112
  4. 200
  5. 108
  6. 304
  7. 64
  8. 272
  9. 144
  10. 144
  11. 132
  12. 112
  13. 96
  14. 260
  15. 168
  16. 88
  17. 296
  18. 120
  19. 248
  20. 280
  21. 128
  22. 48
  23. 56
  24. 116
  25. 232
  26. 76
  27. 148
  28. 232
  29. 216
  30. 160
  31. 68
  32. 180
  33. 216
  34. 60
  35. 248
  36. 192
  37. 264
  38. 96
  39. 128
  40. 212

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