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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 154 · 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. 1.22 × 4 =
  2. 2.28 × 8 =
  3. 3.12 × 8 =
  4. 4.39 × 8 =
  5. 5.23 × 4 =
  6. 6.20 × 4 =
  7. 7.41 × 4 =
  8. 8.35 × 4 =
  9. 9.23 × 8 =
  10. 10.59 × 4 =
  11. 11.56 × 4 =
  12. 12.13 × 8 =
  13. 13.18 × 8 =
  14. 14.68 × 4 =
  15. 15.31 × 4 =
  16. 16.20 × 8 =
  17. 17.32 × 4 =
  18. 18.22 × 8 =
  19. 19.17 × 8 =
  20. 20.70 × 4 =
  21. 21.14 × 4 =
  22. 22.66 × 4 =
  23. 23.18 × 4 =
  24. 24.64 × 4 =
  25. 25.16 × 8 =
  26. 26.30 × 8 =
  27. 27.17 × 4 =
  28. 28.16 × 4 =
  29. 29.50 × 4 =
  30. 30.31 × 8 =
  31. 31.52 × 4 =
  32. 32.26 × 4 =
  33. 33.15 × 8 =
  34. 34.55 × 4 =
  35. 35.44 × 4 =
  36. 36.58 × 4 =
  37. 37.21 × 4 =
  38. 38.33 × 8 =
  39. 39.24 × 4 =
  40. 40.42 × 4 =

Answer key

  1. 88
  2. 224
  3. 96
  4. 312
  5. 92
  6. 80
  7. 164
  8. 140
  9. 184
  10. 236
  11. 224
  12. 104
  13. 144
  14. 272
  15. 124
  16. 160
  17. 128
  18. 176
  19. 136
  20. 280
  21. 56
  22. 264
  23. 72
  24. 256
  25. 128
  26. 240
  27. 68
  28. 64
  29. 200
  30. 248
  31. 208
  32. 104
  33. 120
  34. 220
  35. 176
  36. 232
  37. 84
  38. 264
  39. 96
  40. 168

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