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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 28 · 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. 1.52 × 4 =
  2. 2.31 × 8 =
  3. 3.27 × 8 =
  4. 4.21 × 4 =
  5. 5.27 × 4 =
  6. 6.19 × 8 =
  7. 7.62 × 4 =
  8. 8.48 × 4 =
  9. 9.13 × 8 =
  10. 10.30 × 8 =
  11. 11.40 × 8 =
  12. 12.63 × 4 =
  13. 13.18 × 4 =
  14. 14.46 × 4 =
  15. 15.38 × 8 =
  16. 16.64 × 4 =
  17. 17.37 × 8 =
  18. 18.15 × 4 =
  19. 19.16 × 8 =
  20. 20.39 × 8 =
  21. 21.24 × 8 =
  22. 22.22 × 8 =
  23. 23.28 × 4 =
  24. 24.16 × 4 =
  25. 25.20 × 8 =
  26. 26.29 × 8 =
  27. 27.55 × 4 =
  28. 28.70 × 4 =
  29. 29.45 × 4 =
  30. 30.21 × 8 =
  31. 31.26 × 4 =
  32. 32.18 × 8 =
  33. 33.15 × 8 =
  34. 34.25 × 8 =
  35. 35.61 × 4 =
  36. 36.69 × 4 =
  37. 37.33 × 4 =
  38. 38.13 × 4 =
  39. 39.20 × 4 =
  40. 40.51 × 4 =

Answer key

  1. 208
  2. 248
  3. 216
  4. 84
  5. 108
  6. 152
  7. 248
  8. 192
  9. 104
  10. 240
  11. 320
  12. 252
  13. 72
  14. 184
  15. 304
  16. 256
  17. 296
  18. 60
  19. 128
  20. 312
  21. 192
  22. 176
  23. 112
  24. 64
  25. 160
  26. 232
  27. 220
  28. 280
  29. 180
  30. 168
  31. 104
  32. 144
  33. 120
  34. 200
  35. 244
  36. 276
  37. 132
  38. 52
  39. 80
  40. 204

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