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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 844 · 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. 1.50 × 4 =
  2. 2.39 × 8 =
  3. 3.37 × 8 =
  4. 4.34 × 4 =
  5. 5.34 × 8 =
  6. 6.15 × 4 =
  7. 7.26 × 8 =
  8. 8.23 × 4 =
  9. 9.49 × 4 =
  10. 10.68 × 4 =
  11. 11.22 × 4 =
  12. 12.58 × 4 =
  13. 13.33 × 4 =
  14. 14.16 × 4 =
  15. 15.28 × 8 =
  16. 16.25 × 8 =
  17. 17.17 × 8 =
  18. 18.32 × 4 =
  19. 19.32 × 8 =
  20. 20.19 × 8 =
  21. 21.15 × 8 =
  22. 22.27 × 8 =
  23. 23.12 × 8 =
  24. 24.16 × 8 =
  25. 25.52 × 4 =
  26. 26.36 × 8 =
  27. 27.29 × 8 =
  28. 28.75 × 4 =
  29. 29.46 × 4 =
  30. 30.64 × 4 =
  31. 31.66 × 4 =
  32. 32.73 × 4 =
  33. 33.62 × 4 =
  34. 34.30 × 4 =
  35. 35.39 × 4 =
  36. 36.29 × 4 =
  37. 37.21 × 4 =
  38. 38.42 × 4 =
  39. 39.17 × 4 =
  40. 40.36 × 4 =

Answer key

  1. 200
  2. 312
  3. 296
  4. 136
  5. 272
  6. 60
  7. 208
  8. 92
  9. 196
  10. 272
  11. 88
  12. 232
  13. 132
  14. 64
  15. 224
  16. 200
  17. 136
  18. 128
  19. 256
  20. 152
  21. 120
  22. 216
  23. 96
  24. 128
  25. 208
  26. 288
  27. 232
  28. 300
  29. 184
  30. 256
  31. 264
  32. 292
  33. 248
  34. 120
  35. 156
  36. 116
  37. 84
  38. 168
  39. 68
  40. 144

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