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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 753 · 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. 1.27 × 4 =
  2. 2.49 × 4 =
  3. 3.39 × 8 =
  4. 4.74 × 4 =
  5. 5.19 × 4 =
  6. 6.31 × 8 =
  7. 7.14 × 8 =
  8. 8.15 × 8 =
  9. 9.25 × 8 =
  10. 10.47 × 4 =
  11. 11.24 × 4 =
  12. 12.75 × 4 =
  13. 13.51 × 4 =
  14. 14.18 × 8 =
  15. 15.65 × 4 =
  16. 16.24 × 8 =
  17. 17.15 × 4 =
  18. 18.53 × 4 =
  19. 19.36 × 4 =
  20. 20.43 × 4 =
  21. 21.66 × 4 =
  22. 22.38 × 4 =
  23. 23.16 × 4 =
  24. 24.33 × 8 =
  25. 25.70 × 4 =
  26. 26.32 × 8 =
  27. 27.34 × 4 =
  28. 28.31 × 4 =
  29. 29.12 × 8 =
  30. 30.60 × 4 =
  31. 31.17 × 8 =
  32. 32.35 × 8 =
  33. 33.20 × 8 =
  34. 34.28 × 4 =
  35. 35.21 × 8 =
  36. 36.23 × 4 =
  37. 37.20 × 4 =
  38. 38.29 × 4 =
  39. 39.16 × 8 =
  40. 40.55 × 4 =

Answer key

  1. 108
  2. 196
  3. 312
  4. 296
  5. 76
  6. 248
  7. 112
  8. 120
  9. 200
  10. 188
  11. 96
  12. 300
  13. 204
  14. 144
  15. 260
  16. 192
  17. 60
  18. 212
  19. 144
  20. 172
  21. 264
  22. 152
  23. 64
  24. 264
  25. 280
  26. 256
  27. 136
  28. 124
  29. 96
  30. 240
  31. 136
  32. 280
  33. 160
  34. 112
  35. 168
  36. 92
  37. 80
  38. 116
  39. 128
  40. 220

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