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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 582 · 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. 1.54 × 4 =
  2. 2.64 × 4 =
  3. 3.26 × 8 =
  4. 4.38 × 8 =
  5. 5.14 × 8 =
  6. 6.56 × 4 =
  7. 7.18 × 8 =
  8. 8.20 × 8 =
  9. 9.19 × 4 =
  10. 10.57 × 4 =
  11. 11.42 × 4 =
  12. 12.23 × 4 =
  13. 13.40 × 4 =
  14. 14.28 × 8 =
  15. 15.66 × 4 =
  16. 16.22 × 4 =
  17. 17.35 × 4 =
  18. 18.52 × 4 =
  19. 19.68 × 4 =
  20. 20.25 × 4 =
  21. 21.29 × 8 =
  22. 22.25 × 8 =
  23. 23.16 × 4 =
  24. 24.71 × 4 =
  25. 25.14 × 4 =
  26. 26.21 × 8 =
  27. 27.27 × 8 =
  28. 28.31 × 8 =
  29. 29.55 × 4 =
  30. 30.37 × 8 =
  31. 31.13 × 4 =
  32. 32.15 × 8 =
  33. 33.12 × 8 =
  34. 34.19 × 8 =
  35. 35.17 × 8 =
  36. 36.12 × 4 =
  37. 37.36 × 4 =
  38. 38.60 × 4 =
  39. 39.35 × 8 =
  40. 40.49 × 4 =

Answer key

  1. 216
  2. 256
  3. 208
  4. 304
  5. 112
  6. 224
  7. 144
  8. 160
  9. 76
  10. 228
  11. 168
  12. 92
  13. 160
  14. 224
  15. 264
  16. 88
  17. 140
  18. 208
  19. 272
  20. 100
  21. 232
  22. 200
  23. 64
  24. 284
  25. 56
  26. 168
  27. 216
  28. 248
  29. 220
  30. 296
  31. 52
  32. 120
  33. 96
  34. 152
  35. 136
  36. 48
  37. 144
  38. 240
  39. 280
  40. 196

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