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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 885 · 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. 1.42 × 4 =
  2. 2.27 × 8 =
  3. 3.52 × 4 =
  4. 4.12 × 4 =
  5. 5.29 × 8 =
  6. 6.14 × 8 =
  7. 7.73 × 4 =
  8. 8.40 × 8 =
  9. 9.53 × 4 =
  10. 10.13 × 8 =
  11. 11.49 × 4 =
  12. 12.15 × 8 =
  13. 13.20 × 4 =
  14. 14.27 × 4 =
  15. 15.17 × 8 =
  16. 16.70 × 4 =
  17. 17.32 × 8 =
  18. 18.56 × 4 =
  19. 19.16 × 8 =
  20. 20.19 × 4 =
  21. 21.20 × 8 =
  22. 22.39 × 8 =
  23. 23.21 × 4 =
  24. 24.26 × 4 =
  25. 25.68 × 4 =
  26. 26.13 × 4 =
  27. 27.38 × 8 =
  28. 28.40 × 4 =
  29. 29.63 × 4 =
  30. 30.64 × 4 =
  31. 31.25 × 8 =
  32. 32.74 × 4 =
  33. 33.31 × 4 =
  34. 34.29 × 4 =
  35. 35.28 × 4 =
  36. 36.58 × 4 =
  37. 37.60 × 4 =
  38. 38.66 × 4 =
  39. 39.23 × 8 =
  40. 40.51 × 4 =

Answer key

  1. 168
  2. 216
  3. 208
  4. 48
  5. 232
  6. 112
  7. 292
  8. 320
  9. 212
  10. 104
  11. 196
  12. 120
  13. 80
  14. 108
  15. 136
  16. 280
  17. 256
  18. 224
  19. 128
  20. 76
  21. 160
  22. 312
  23. 84
  24. 104
  25. 272
  26. 52
  27. 304
  28. 160
  29. 252
  30. 256
  31. 200
  32. 296
  33. 124
  34. 116
  35. 112
  36. 232
  37. 240
  38. 264
  39. 184
  40. 204

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