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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 800 · 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. 1.26 × 4 =
  2. 2.33 × 8 =
  3. 3.68 × 4 =
  4. 4.20 × 8 =
  5. 5.24 × 8 =
  6. 6.19 × 4 =
  7. 7.12 × 4 =
  8. 8.73 × 4 =
  9. 9.31 × 4 =
  10. 10.49 × 4 =
  11. 11.26 × 8 =
  12. 12.21 × 4 =
  13. 13.50 × 4 =
  14. 14.14 × 4 =
  15. 15.74 × 4 =
  16. 16.18 × 8 =
  17. 17.34 × 8 =
  18. 18.41 × 4 =
  19. 19.17 × 8 =
  20. 20.53 × 4 =
  21. 21.32 × 8 =
  22. 22.22 × 4 =
  23. 23.18 × 4 =
  24. 24.13 × 4 =
  25. 25.45 × 4 =
  26. 26.19 × 8 =
  27. 27.30 × 4 =
  28. 28.39 × 4 =
  29. 29.70 × 4 =
  30. 30.20 × 4 =
  31. 31.23 × 4 =
  32. 32.56 × 4 =
  33. 33.63 × 4 =
  34. 34.12 × 8 =
  35. 35.29 × 8 =
  36. 36.60 × 4 =
  37. 37.34 × 4 =
  38. 38.15 × 4 =
  39. 39.44 × 4 =
  40. 40.22 × 8 =

Answer key

  1. 104
  2. 264
  3. 272
  4. 160
  5. 192
  6. 76
  7. 48
  8. 292
  9. 124
  10. 196
  11. 208
  12. 84
  13. 200
  14. 56
  15. 296
  16. 144
  17. 272
  18. 164
  19. 136
  20. 212
  21. 256
  22. 88
  23. 72
  24. 52
  25. 180
  26. 152
  27. 120
  28. 156
  29. 280
  30. 80
  31. 92
  32. 224
  33. 252
  34. 96
  35. 232
  36. 240
  37. 136
  38. 60
  39. 176
  40. 176

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