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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 146 · 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. 1.24 × 4 =
  2. 2.13 × 8 =
  3. 3.15 × 4 =
  4. 4.18 × 4 =
  5. 5.38 × 4 =
  6. 6.25 × 4 =
  7. 7.12 × 4 =
  8. 8.28 × 4 =
  9. 9.37 × 8 =
  10. 10.30 × 8 =
  11. 11.19 × 8 =
  12. 12.27 × 4 =
  13. 13.40 × 8 =
  14. 14.62 × 4 =
  15. 15.70 × 4 =
  16. 16.16 × 8 =
  17. 17.34 × 8 =
  18. 18.12 × 8 =
  19. 19.73 × 4 =
  20. 20.13 × 4 =
  21. 21.17 × 8 =
  22. 22.28 × 8 =
  23. 23.14 × 8 =
  24. 24.52 × 4 =
  25. 25.67 × 4 =
  26. 26.44 × 4 =
  27. 27.56 × 4 =
  28. 28.35 × 8 =
  29. 29.46 × 4 =
  30. 30.31 × 8 =
  31. 31.45 × 4 =
  32. 32.22 × 4 =
  33. 33.25 × 8 =
  34. 34.39 × 8 =
  35. 35.21 × 4 =
  36. 36.65 × 4 =
  37. 37.33 × 8 =
  38. 38.64 × 4 =
  39. 39.17 × 4 =
  40. 40.23 × 4 =

Answer key

  1. 96
  2. 104
  3. 60
  4. 72
  5. 152
  6. 100
  7. 48
  8. 112
  9. 296
  10. 240
  11. 152
  12. 108
  13. 320
  14. 248
  15. 280
  16. 128
  17. 272
  18. 96
  19. 292
  20. 52
  21. 136
  22. 224
  23. 112
  24. 208
  25. 268
  26. 176
  27. 224
  28. 280
  29. 184
  30. 248
  31. 180
  32. 88
  33. 200
  34. 312
  35. 84
  36. 260
  37. 264
  38. 256
  39. 68
  40. 92

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