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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 295 · 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. 1.57 × 4 =
  2. 2.73 × 4 =
  3. 3.15 × 4 =
  4. 4.22 × 8 =
  5. 5.27 × 4 =
  6. 6.34 × 8 =
  7. 7.68 × 4 =
  8. 8.32 × 4 =
  9. 9.30 × 4 =
  10. 10.12 × 4 =
  11. 11.33 × 8 =
  12. 12.33 × 4 =
  13. 13.24 × 8 =
  14. 14.75 × 4 =
  15. 15.39 × 4 =
  16. 16.18 × 8 =
  17. 17.14 × 8 =
  18. 18.53 × 4 =
  19. 19.36 × 8 =
  20. 20.20 × 4 =
  21. 21.12 × 8 =
  22. 22.16 × 4 =
  23. 23.17 × 8 =
  24. 24.30 × 8 =
  25. 25.13 × 8 =
  26. 26.20 × 8 =
  27. 27.26 × 8 =
  28. 28.44 × 4 =
  29. 29.60 × 4 =
  30. 30.16 × 8 =
  31. 31.48 × 4 =
  32. 32.54 × 4 =
  33. 33.64 × 4 =
  34. 34.19 × 4 =
  35. 35.63 × 4 =
  36. 36.29 × 8 =
  37. 37.37 × 8 =
  38. 38.27 × 8 =
  39. 39.50 × 4 =
  40. 40.39 × 8 =

Answer key

  1. 228
  2. 292
  3. 60
  4. 176
  5. 108
  6. 272
  7. 272
  8. 128
  9. 120
  10. 48
  11. 264
  12. 132
  13. 192
  14. 300
  15. 156
  16. 144
  17. 112
  18. 212
  19. 288
  20. 80
  21. 96
  22. 64
  23. 136
  24. 240
  25. 104
  26. 160
  27. 208
  28. 176
  29. 240
  30. 128
  31. 192
  32. 216
  33. 256
  34. 76
  35. 252
  36. 232
  37. 296
  38. 216
  39. 200
  40. 312

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