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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 21 · 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. 1.59 × 4 =
  2. 2.19 × 8 =
  3. 3.12 × 4 =
  4. 4.49 × 4 =
  5. 5.33 × 8 =
  6. 6.35 × 8 =
  7. 7.70 × 4 =
  8. 8.68 × 4 =
  9. 9.39 × 8 =
  10. 10.25 × 4 =
  11. 11.36 × 8 =
  12. 12.29 × 8 =
  13. 13.12 × 8 =
  14. 14.25 × 8 =
  15. 15.50 × 4 =
  16. 16.37 × 8 =
  17. 17.64 × 4 =
  18. 18.18 × 8 =
  19. 19.30 × 4 =
  20. 20.51 × 4 =
  21. 21.26 × 8 =
  22. 22.18 × 4 =
  23. 23.36 × 4 =
  24. 24.32 × 8 =
  25. 25.27 × 8 =
  26. 26.28 × 8 =
  27. 27.27 × 4 =
  28. 28.28 × 4 =
  29. 29.38 × 8 =
  30. 30.23 × 8 =
  31. 31.21 × 4 =
  32. 32.52 × 4 =
  33. 33.42 × 4 =
  34. 34.33 × 4 =
  35. 35.17 × 8 =
  36. 36.34 × 8 =
  37. 37.55 × 4 =
  38. 38.20 × 8 =
  39. 39.13 × 8 =
  40. 40.13 × 4 =

Answer key

  1. 236
  2. 152
  3. 48
  4. 196
  5. 264
  6. 280
  7. 280
  8. 272
  9. 312
  10. 100
  11. 288
  12. 232
  13. 96
  14. 200
  15. 200
  16. 296
  17. 256
  18. 144
  19. 120
  20. 204
  21. 208
  22. 72
  23. 144
  24. 256
  25. 216
  26. 224
  27. 108
  28. 112
  29. 304
  30. 184
  31. 84
  32. 208
  33. 168
  34. 132
  35. 136
  36. 272
  37. 220
  38. 160
  39. 104
  40. 52

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