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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 457 · 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. 1.28 × 8 =
  2. 2.23 × 4 =
  3. 3.29 × 4 =
  4. 4.14 × 8 =
  5. 5.16 × 8 =
  6. 6.55 × 4 =
  7. 7.33 × 8 =
  8. 8.21 × 4 =
  9. 9.34 × 8 =
  10. 10.40 × 4 =
  11. 11.41 × 4 =
  12. 12.61 × 4 =
  13. 13.12 × 4 =
  14. 14.32 × 8 =
  15. 15.24 × 8 =
  16. 16.20 × 8 =
  17. 17.22 × 8 =
  18. 18.22 × 4 =
  19. 19.37 × 4 =
  20. 20.19 × 8 =
  21. 21.39 × 4 =
  22. 22.13 × 4 =
  23. 23.15 × 4 =
  24. 24.16 × 4 =
  25. 25.15 × 8 =
  26. 26.37 × 8 =
  27. 27.44 × 4 =
  28. 28.51 × 4 =
  29. 29.20 × 4 =
  30. 30.73 × 4 =
  31. 31.27 × 8 =
  32. 32.12 × 8 =
  33. 33.40 × 8 =
  34. 34.69 × 4 =
  35. 35.25 × 4 =
  36. 36.71 × 4 =
  37. 37.38 × 8 =
  38. 38.32 × 4 =
  39. 39.21 × 8 =
  40. 40.50 × 4 =

Answer key

  1. 224
  2. 92
  3. 116
  4. 112
  5. 128
  6. 220
  7. 264
  8. 84
  9. 272
  10. 160
  11. 164
  12. 244
  13. 48
  14. 256
  15. 192
  16. 160
  17. 176
  18. 88
  19. 148
  20. 152
  21. 156
  22. 52
  23. 60
  24. 64
  25. 120
  26. 296
  27. 176
  28. 204
  29. 80
  30. 292
  31. 216
  32. 96
  33. 320
  34. 276
  35. 100
  36. 284
  37. 304
  38. 128
  39. 168
  40. 200

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