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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 7 · 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. 1.54 × 4 =
  2. 2.26 × 8 =
  3. 3.38 × 8 =
  4. 4.17 × 4 =
  5. 5.28 × 8 =
  6. 6.30 × 4 =
  7. 7.19 × 8 =
  8. 8.34 × 4 =
  9. 9.33 × 4 =
  10. 10.18 × 8 =
  11. 11.32 × 4 =
  12. 12.15 × 8 =
  13. 13.51 × 4 =
  14. 14.14 × 4 =
  15. 15.12 × 4 =
  16. 16.72 × 4 =
  17. 17.21 × 4 =
  18. 18.25 × 8 =
  19. 19.22 × 4 =
  20. 20.31 × 8 =
  21. 21.26 × 4 =
  22. 22.36 × 8 =
  23. 23.14 × 8 =
  24. 24.24 × 4 =
  25. 25.13 × 8 =
  26. 26.73 × 4 =
  27. 27.53 × 4 =
  28. 28.13 × 4 =
  29. 29.22 × 8 =
  30. 30.50 × 4 =
  31. 31.37 × 8 =
  32. 32.15 × 4 =
  33. 33.60 × 4 =
  34. 34.38 × 4 =
  35. 35.24 × 8 =
  36. 36.16 × 8 =
  37. 37.35 × 8 =
  38. 38.41 × 4 =
  39. 39.40 × 8 =
  40. 40.27 × 8 =

Answer key

  1. 216
  2. 208
  3. 304
  4. 68
  5. 224
  6. 120
  7. 152
  8. 136
  9. 132
  10. 144
  11. 128
  12. 120
  13. 204
  14. 56
  15. 48
  16. 288
  17. 84
  18. 200
  19. 88
  20. 248
  21. 104
  22. 288
  23. 112
  24. 96
  25. 104
  26. 292
  27. 212
  28. 52
  29. 176
  30. 200
  31. 296
  32. 60
  33. 240
  34. 152
  35. 192
  36. 128
  37. 280
  38. 164
  39. 320
  40. 216

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