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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 637 · 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. 1.34 × 8 =
  2. 2.26 × 8 =
  3. 3.31 × 4 =
  4. 4.37 × 8 =
  5. 5.21 × 4 =
  6. 6.18 × 8 =
  7. 7.20 × 4 =
  8. 8.28 × 4 =
  9. 9.12 × 8 =
  10. 10.21 × 8 =
  11. 11.17 × 4 =
  12. 12.75 × 4 =
  13. 13.29 × 8 =
  14. 14.52 × 4 =
  15. 15.13 × 8 =
  16. 16.24 × 8 =
  17. 17.27 × 8 =
  18. 18.71 × 4 =
  19. 19.65 × 4 =
  20. 20.25 × 8 =
  21. 21.35 × 4 =
  22. 22.36 × 8 =
  23. 23.40 × 8 =
  24. 24.68 × 4 =
  25. 25.24 × 4 =
  26. 26.43 × 4 =
  27. 27.64 × 4 =
  28. 28.31 × 8 =
  29. 29.72 × 4 =
  30. 30.49 × 4 =
  31. 31.36 × 4 =
  32. 32.15 × 4 =
  33. 33.74 × 4 =
  34. 34.48 × 4 =
  35. 35.40 × 4 =
  36. 36.15 × 8 =
  37. 37.12 × 4 =
  38. 38.27 × 4 =
  39. 39.22 × 4 =
  40. 40.18 × 4 =

Answer key

  1. 272
  2. 208
  3. 124
  4. 296
  5. 84
  6. 144
  7. 80
  8. 112
  9. 96
  10. 168
  11. 68
  12. 300
  13. 232
  14. 208
  15. 104
  16. 192
  17. 216
  18. 284
  19. 260
  20. 200
  21. 140
  22. 288
  23. 320
  24. 272
  25. 96
  26. 172
  27. 256
  28. 248
  29. 288
  30. 196
  31. 144
  32. 60
  33. 296
  34. 192
  35. 160
  36. 120
  37. 48
  38. 108
  39. 88
  40. 72

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