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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 922 · 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. 1.63 × 4 =
  2. 2.22 × 8 =
  3. 3.18 × 8 =
  4. 4.46 × 4 =
  5. 5.16 × 4 =
  6. 6.38 × 8 =
  7. 7.14 × 4 =
  8. 8.19 × 4 =
  9. 9.15 × 4 =
  10. 10.30 × 8 =
  11. 11.25 × 4 =
  12. 12.12 × 8 =
  13. 13.69 × 4 =
  14. 14.20 × 4 =
  15. 15.39 × 8 =
  16. 16.52 × 4 =
  17. 17.37 × 8 =
  18. 18.33 × 4 =
  19. 19.60 × 4 =
  20. 20.26 × 4 =
  21. 21.38 × 4 =
  22. 22.61 × 4 =
  23. 23.14 × 8 =
  24. 24.35 × 8 =
  25. 25.13 × 4 =
  26. 26.50 × 4 =
  27. 27.74 × 4 =
  28. 28.25 × 8 =
  29. 29.40 × 8 =
  30. 30.33 × 8 =
  31. 31.21 × 8 =
  32. 32.72 × 4 =
  33. 33.32 × 8 =
  34. 34.66 × 4 =
  35. 35.27 × 8 =
  36. 36.23 × 4 =
  37. 37.19 × 8 =
  38. 38.49 × 4 =
  39. 39.45 × 4 =
  40. 40.16 × 8 =

Answer key

  1. 252
  2. 176
  3. 144
  4. 184
  5. 64
  6. 304
  7. 56
  8. 76
  9. 60
  10. 240
  11. 100
  12. 96
  13. 276
  14. 80
  15. 312
  16. 208
  17. 296
  18. 132
  19. 240
  20. 104
  21. 152
  22. 244
  23. 112
  24. 280
  25. 52
  26. 200
  27. 296
  28. 200
  29. 320
  30. 264
  31. 168
  32. 288
  33. 256
  34. 264
  35. 216
  36. 92
  37. 152
  38. 196
  39. 180
  40. 128

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