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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 61 · 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. 1.22 × 4 =
  2. 2.66 × 4 =
  3. 3.34 × 8 =
  4. 4.71 × 4 =
  5. 5.30 × 8 =
  6. 6.51 × 4 =
  7. 7.25 × 8 =
  8. 8.33 × 4 =
  9. 9.20 × 4 =
  10. 10.28 × 8 =
  11. 11.75 × 4 =
  12. 12.36 × 4 =
  13. 13.21 × 8 =
  14. 14.24 × 8 =
  15. 15.33 × 8 =
  16. 16.60 × 4 =
  17. 17.74 × 4 =
  18. 18.18 × 4 =
  19. 19.15 × 8 =
  20. 20.26 × 8 =
  21. 21.32 × 8 =
  22. 22.46 × 4 =
  23. 23.48 × 4 =
  24. 24.52 × 4 =
  25. 25.18 × 8 =
  26. 26.17 × 4 =
  27. 27.37 × 8 =
  28. 28.50 × 4 =
  29. 29.28 × 4 =
  30. 30.14 × 8 =
  31. 31.40 × 8 =
  32. 32.73 × 4 =
  33. 33.15 × 4 =
  34. 34.64 × 4 =
  35. 35.32 × 4 =
  36. 36.14 × 4 =
  37. 37.27 × 4 =
  38. 38.62 × 4 =
  39. 39.19 × 8 =
  40. 40.29 × 4 =

Answer key

  1. 88
  2. 264
  3. 272
  4. 284
  5. 240
  6. 204
  7. 200
  8. 132
  9. 80
  10. 224
  11. 300
  12. 144
  13. 168
  14. 192
  15. 264
  16. 240
  17. 296
  18. 72
  19. 120
  20. 208
  21. 256
  22. 184
  23. 192
  24. 208
  25. 144
  26. 68
  27. 296
  28. 200
  29. 112
  30. 112
  31. 320
  32. 292
  33. 60
  34. 256
  35. 128
  36. 56
  37. 108
  38. 248
  39. 152
  40. 116

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