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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 57 · 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. 1.41 × 4 =
  2. 2.16 × 8 =
  3. 3.39 × 8 =
  4. 4.21 × 4 =
  5. 5.28 × 4 =
  6. 6.22 × 8 =
  7. 7.37 × 4 =
  8. 8.38 × 8 =
  9. 9.35 × 4 =
  10. 10.40 × 8 =
  11. 11.18 × 4 =
  12. 12.48 × 4 =
  13. 13.33 × 4 =
  14. 14.71 × 4 =
  15. 15.34 × 8 =
  16. 16.32 × 8 =
  17. 17.12 × 8 =
  18. 18.37 × 8 =
  19. 19.12 × 4 =
  20. 20.23 × 4 =
  21. 21.70 × 4 =
  22. 22.24 × 4 =
  23. 23.23 × 8 =
  24. 24.13 × 8 =
  25. 25.44 × 4 =
  26. 26.27 × 8 =
  27. 27.14 × 8 =
  28. 28.15 × 4 =
  29. 29.14 × 4 =
  30. 30.29 × 8 =
  31. 31.36 × 4 =
  32. 32.26 × 8 =
  33. 33.26 × 4 =
  34. 34.20 × 4 =
  35. 35.55 × 4 =
  36. 36.27 × 4 =
  37. 37.15 × 8 =
  38. 38.24 × 8 =
  39. 39.68 × 4 =
  40. 40.50 × 4 =

Answer key

  1. 164
  2. 128
  3. 312
  4. 84
  5. 112
  6. 176
  7. 148
  8. 304
  9. 140
  10. 320
  11. 72
  12. 192
  13. 132
  14. 284
  15. 272
  16. 256
  17. 96
  18. 296
  19. 48
  20. 92
  21. 280
  22. 96
  23. 184
  24. 104
  25. 176
  26. 216
  27. 112
  28. 60
  29. 56
  30. 232
  31. 144
  32. 208
  33. 104
  34. 80
  35. 220
  36. 108
  37. 120
  38. 192
  39. 272
  40. 200

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