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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 915 · 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. 1.16 × 4 =
  2. 2.13 × 8 =
  3. 3.32 × 8 =
  4. 4.35 × 4 =
  5. 5.32 × 4 =
  6. 6.13 × 4 =
  7. 7.12 × 4 =
  8. 8.73 × 4 =
  9. 9.15 × 8 =
  10. 10.68 × 4 =
  11. 11.26 × 4 =
  12. 12.66 × 4 =
  13. 13.47 × 4 =
  14. 14.39 × 8 =
  15. 15.37 × 8 =
  16. 16.17 × 4 =
  17. 17.42 × 4 =
  18. 18.29 × 4 =
  19. 19.26 × 8 =
  20. 20.18 × 4 =
  21. 21.19 × 8 =
  22. 22.21 × 8 =
  23. 23.39 × 4 =
  24. 24.31 × 8 =
  25. 25.25 × 8 =
  26. 26.34 × 8 =
  27. 27.12 × 8 =
  28. 28.37 × 4 =
  29. 29.28 × 4 =
  30. 30.19 × 4 =
  31. 31.56 × 4 =
  32. 32.25 × 4 =
  33. 33.40 × 8 =
  34. 34.36 × 4 =
  35. 35.75 × 4 =
  36. 36.17 × 8 =
  37. 37.16 × 8 =
  38. 38.74 × 4 =
  39. 39.33 × 8 =
  40. 40.43 × 4 =

Answer key

  1. 64
  2. 104
  3. 256
  4. 140
  5. 128
  6. 52
  7. 48
  8. 292
  9. 120
  10. 272
  11. 104
  12. 264
  13. 188
  14. 312
  15. 296
  16. 68
  17. 168
  18. 116
  19. 208
  20. 72
  21. 152
  22. 168
  23. 156
  24. 248
  25. 200
  26. 272
  27. 96
  28. 148
  29. 112
  30. 76
  31. 224
  32. 100
  33. 320
  34. 144
  35. 300
  36. 136
  37. 128
  38. 296
  39. 264
  40. 172

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