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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 124 · 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. 1.14 × 8 =
  2. 2.31 × 8 =
  3. 3.46 × 4 =
  4. 4.63 × 4 =
  5. 5.30 × 8 =
  6. 6.12 × 8 =
  7. 7.15 × 8 =
  8. 8.33 × 4 =
  9. 9.34 × 8 =
  10. 10.22 × 4 =
  11. 11.24 × 8 =
  12. 12.18 × 8 =
  13. 13.50 × 4 =
  14. 14.39 × 8 =
  15. 15.21 × 8 =
  16. 16.55 × 4 =
  17. 17.13 × 8 =
  18. 18.27 × 4 =
  19. 19.54 × 4 =
  20. 20.21 × 4 =
  21. 21.53 × 4 =
  22. 22.71 × 4 =
  23. 23.30 × 4 =
  24. 24.42 × 4 =
  25. 25.23 × 8 =
  26. 26.20 × 4 =
  27. 27.18 × 4 =
  28. 28.19 × 4 =
  29. 29.48 × 4 =
  30. 30.75 × 4 =
  31. 31.19 × 8 =
  32. 32.40 × 8 =
  33. 33.73 × 4 =
  34. 34.35 × 8 =
  35. 35.56 × 4 =
  36. 36.52 × 4 =
  37. 37.33 × 8 =
  38. 38.28 × 4 =
  39. 39.17 × 4 =
  40. 40.51 × 4 =

Answer key

  1. 112
  2. 248
  3. 184
  4. 252
  5. 240
  6. 96
  7. 120
  8. 132
  9. 272
  10. 88
  11. 192
  12. 144
  13. 200
  14. 312
  15. 168
  16. 220
  17. 104
  18. 108
  19. 216
  20. 84
  21. 212
  22. 284
  23. 120
  24. 168
  25. 184
  26. 80
  27. 72
  28. 76
  29. 192
  30. 300
  31. 152
  32. 320
  33. 292
  34. 280
  35. 224
  36. 208
  37. 264
  38. 112
  39. 68
  40. 204

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