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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 506 · 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. 1.58 × 4 =
  2. 2.29 × 8 =
  3. 3.12 × 4 =
  4. 4.27 × 8 =
  5. 5.42 × 4 =
  6. 6.22 × 4 =
  7. 7.31 × 8 =
  8. 8.60 × 4 =
  9. 9.37 × 8 =
  10. 10.19 × 8 =
  11. 11.36 × 8 =
  12. 12.21 × 4 =
  13. 13.14 × 8 =
  14. 14.13 × 8 =
  15. 15.72 × 4 =
  16. 16.38 × 4 =
  17. 17.13 × 4 =
  18. 18.54 × 4 =
  19. 19.49 × 4 =
  20. 20.14 × 4 =
  21. 21.34 × 4 =
  22. 22.24 × 4 =
  23. 23.17 × 8 =
  24. 24.50 × 4 =
  25. 25.27 × 4 =
  26. 26.41 × 4 =
  27. 27.18 × 4 =
  28. 28.24 × 8 =
  29. 29.32 × 8 =
  30. 30.52 × 4 =
  31. 31.26 × 8 =
  32. 32.39 × 4 =
  33. 33.40 × 4 =
  34. 34.23 × 4 =
  35. 35.38 × 8 =
  36. 36.40 × 8 =
  37. 37.34 × 8 =
  38. 38.33 × 8 =
  39. 39.44 × 4 =
  40. 40.39 × 8 =

Answer key

  1. 232
  2. 232
  3. 48
  4. 216
  5. 168
  6. 88
  7. 248
  8. 240
  9. 296
  10. 152
  11. 288
  12. 84
  13. 112
  14. 104
  15. 288
  16. 152
  17. 52
  18. 216
  19. 196
  20. 56
  21. 136
  22. 96
  23. 136
  24. 200
  25. 108
  26. 164
  27. 72
  28. 192
  29. 256
  30. 208
  31. 208
  32. 156
  33. 160
  34. 92
  35. 304
  36. 320
  37. 272
  38. 264
  39. 176
  40. 312

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