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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 386 · 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. 1.21 × 8 =
  2. 2.41 × 4 =
  3. 3.12 × 4 =
  4. 4.37 × 8 =
  5. 5.29 × 8 =
  6. 6.65 × 4 =
  7. 7.23 × 4 =
  8. 8.69 × 4 =
  9. 9.32 × 8 =
  10. 10.25 × 8 =
  11. 11.12 × 8 =
  12. 12.66 × 4 =
  13. 13.35 × 8 =
  14. 14.21 × 4 =
  15. 15.26 × 8 =
  16. 16.24 × 4 =
  17. 17.25 × 4 =
  18. 18.29 × 4 =
  19. 19.19 × 8 =
  20. 20.28 × 4 =
  21. 21.15 × 4 =
  22. 22.33 × 8 =
  23. 23.39 × 8 =
  24. 24.64 × 4 =
  25. 25.24 × 8 =
  26. 26.27 × 8 =
  27. 27.48 × 4 =
  28. 28.71 × 4 =
  29. 29.58 × 4 =
  30. 30.73 × 4 =
  31. 31.75 × 4 =
  32. 32.22 × 8 =
  33. 33.46 × 4 =
  34. 34.55 × 4 =
  35. 35.20 × 8 =
  36. 36.38 × 4 =
  37. 37.17 × 4 =
  38. 38.72 × 4 =
  39. 39.30 × 8 =
  40. 40.42 × 4 =

Answer key

  1. 168
  2. 164
  3. 48
  4. 296
  5. 232
  6. 260
  7. 92
  8. 276
  9. 256
  10. 200
  11. 96
  12. 264
  13. 280
  14. 84
  15. 208
  16. 96
  17. 100
  18. 116
  19. 152
  20. 112
  21. 60
  22. 264
  23. 312
  24. 256
  25. 192
  26. 216
  27. 192
  28. 284
  29. 232
  30. 292
  31. 300
  32. 176
  33. 184
  34. 220
  35. 160
  36. 152
  37. 68
  38. 288
  39. 240
  40. 168

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