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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 251 · 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. 1.64 × 4 =
  2. 2.25 × 8 =
  3. 3.16 × 4 =
  4. 4.20 × 4 =
  5. 5.50 × 4 =
  6. 6.37 × 8 =
  7. 7.37 × 4 =
  8. 8.38 × 8 =
  9. 9.15 × 8 =
  10. 10.25 × 4 =
  11. 11.40 × 4 =
  12. 12.31 × 4 =
  13. 13.18 × 4 =
  14. 14.27 × 8 =
  15. 15.18 × 8 =
  16. 16.29 × 4 =
  17. 17.63 × 4 =
  18. 18.22 × 8 =
  19. 19.13 × 4 =
  20. 20.28 × 4 =
  21. 21.30 × 8 =
  22. 22.31 × 8 =
  23. 23.21 × 4 =
  24. 24.61 × 4 =
  25. 25.15 × 4 =
  26. 26.72 × 4 =
  27. 27.34 × 8 =
  28. 28.53 × 4 =
  29. 29.70 × 4 =
  30. 30.32 × 8 =
  31. 31.24 × 4 =
  32. 32.35 × 4 =
  33. 33.29 × 8 =
  34. 34.17 × 4 =
  35. 35.45 × 4 =
  36. 36.48 × 4 =
  37. 37.19 × 4 =
  38. 38.27 × 4 =
  39. 39.19 × 8 =
  40. 40.71 × 4 =

Answer key

  1. 256
  2. 200
  3. 64
  4. 80
  5. 200
  6. 296
  7. 148
  8. 304
  9. 120
  10. 100
  11. 160
  12. 124
  13. 72
  14. 216
  15. 144
  16. 116
  17. 252
  18. 176
  19. 52
  20. 112
  21. 240
  22. 248
  23. 84
  24. 244
  25. 60
  26. 288
  27. 272
  28. 212
  29. 280
  30. 256
  31. 96
  32. 140
  33. 232
  34. 68
  35. 180
  36. 192
  37. 76
  38. 108
  39. 152
  40. 284

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