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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 306 · 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. 1.21 × 8 =
  2. 2.15 × 4 =
  3. 3.17 × 4 =
  4. 4.22 × 4 =
  5. 5.61 × 4 =
  6. 6.62 × 4 =
  7. 7.36 × 8 =
  8. 8.35 × 8 =
  9. 9.38 × 4 =
  10. 10.27 × 4 =
  11. 11.22 × 8 =
  12. 12.18 × 4 =
  13. 13.40 × 8 =
  14. 14.30 × 8 =
  15. 15.39 × 8 =
  16. 16.23 × 4 =
  17. 17.55 × 4 =
  18. 18.37 × 8 =
  19. 19.13 × 4 =
  20. 20.30 × 4 =
  21. 21.29 × 8 =
  22. 22.15 × 8 =
  23. 23.29 × 4 =
  24. 24.19 × 8 =
  25. 25.42 × 4 =
  26. 26.14 × 4 =
  27. 27.72 × 4 =
  28. 28.14 × 8 =
  29. 29.17 × 8 =
  30. 30.39 × 4 =
  31. 31.25 × 8 =
  32. 32.73 × 4 =
  33. 33.57 × 4 =
  34. 34.28 × 4 =
  35. 35.26 × 8 =
  36. 36.32 × 8 =
  37. 37.31 × 8 =
  38. 38.27 × 8 =
  39. 39.35 × 4 =
  40. 40.64 × 4 =

Answer key

  1. 168
  2. 60
  3. 68
  4. 88
  5. 244
  6. 248
  7. 288
  8. 280
  9. 152
  10. 108
  11. 176
  12. 72
  13. 320
  14. 240
  15. 312
  16. 92
  17. 220
  18. 296
  19. 52
  20. 120
  21. 232
  22. 120
  23. 116
  24. 152
  25. 168
  26. 56
  27. 288
  28. 112
  29. 136
  30. 156
  31. 200
  32. 292
  33. 228
  34. 112
  35. 208
  36. 256
  37. 248
  38. 216
  39. 140
  40. 256

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