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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 109 · 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. 1.23 × 8 =
  2. 2.37 × 8 =
  3. 3.22 × 8 =
  4. 4.69 × 4 =
  5. 5.27 × 4 =
  6. 6.13 × 8 =
  7. 7.64 × 4 =
  8. 8.31 × 4 =
  9. 9.34 × 8 =
  10. 10.26 × 8 =
  11. 11.68 × 4 =
  12. 12.57 × 4 =
  13. 13.53 × 4 =
  14. 14.15 × 8 =
  15. 15.21 × 4 =
  16. 16.23 × 4 =
  17. 17.72 × 4 =
  18. 18.45 × 4 =
  19. 19.47 × 4 =
  20. 20.33 × 4 =
  21. 21.14 × 4 =
  22. 22.16 × 8 =
  23. 23.50 × 4 =
  24. 24.39 × 8 =
  25. 25.36 × 8 =
  26. 26.17 × 8 =
  27. 27.20 × 8 =
  28. 28.30 × 8 =
  29. 29.20 × 4 =
  30. 30.22 × 4 =
  31. 31.32 × 8 =
  32. 32.17 × 4 =
  33. 33.25 × 8 =
  34. 34.19 × 8 =
  35. 35.56 × 4 =
  36. 36.66 × 4 =
  37. 37.44 × 4 =
  38. 38.24 × 4 =
  39. 39.73 × 4 =
  40. 40.33 × 8 =

Answer key

  1. 184
  2. 296
  3. 176
  4. 276
  5. 108
  6. 104
  7. 256
  8. 124
  9. 272
  10. 208
  11. 272
  12. 228
  13. 212
  14. 120
  15. 84
  16. 92
  17. 288
  18. 180
  19. 188
  20. 132
  21. 56
  22. 128
  23. 200
  24. 312
  25. 288
  26. 136
  27. 160
  28. 240
  29. 80
  30. 88
  31. 256
  32. 68
  33. 200
  34. 152
  35. 224
  36. 264
  37. 176
  38. 96
  39. 292
  40. 264

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