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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 366 · 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. 1.15 × 4 =
  2. 2.68 × 4 =
  3. 3.14 × 8 =
  4. 4.30 × 4 =
  5. 5.36 × 8 =
  6. 6.69 × 4 =
  7. 7.29 × 8 =
  8. 8.34 × 8 =
  9. 9.14 × 4 =
  10. 10.30 × 8 =
  11. 11.27 × 8 =
  12. 12.54 × 4 =
  13. 13.41 × 4 =
  14. 14.13 × 4 =
  15. 15.27 × 4 =
  16. 16.31 × 4 =
  17. 17.28 × 8 =
  18. 18.19 × 8 =
  19. 19.39 × 8 =
  20. 20.24 × 4 =
  21. 21.56 × 4 =
  22. 22.22 × 4 =
  23. 23.18 × 4 =
  24. 24.20 × 8 =
  25. 25.25 × 8 =
  26. 26.13 × 8 =
  27. 27.17 × 8 =
  28. 28.52 × 4 =
  29. 29.26 × 4 =
  30. 30.75 × 4 =
  31. 31.32 × 8 =
  32. 32.33 × 8 =
  33. 33.40 × 8 =
  34. 34.51 × 4 =
  35. 35.72 × 4 =
  36. 36.25 × 4 =
  37. 37.26 × 8 =
  38. 38.33 × 4 =
  39. 39.65 × 4 =
  40. 40.12 × 8 =

Answer key

  1. 60
  2. 272
  3. 112
  4. 120
  5. 288
  6. 276
  7. 232
  8. 272
  9. 56
  10. 240
  11. 216
  12. 216
  13. 164
  14. 52
  15. 108
  16. 124
  17. 224
  18. 152
  19. 312
  20. 96
  21. 224
  22. 88
  23. 72
  24. 160
  25. 200
  26. 104
  27. 136
  28. 208
  29. 104
  30. 300
  31. 256
  32. 264
  33. 320
  34. 204
  35. 288
  36. 100
  37. 208
  38. 132
  39. 260
  40. 96

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