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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 246 · 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. 1.28 × 8 =
  2. 2.29 × 4 =
  3. 3.39 × 8 =
  4. 4.34 × 4 =
  5. 5.32 × 8 =
  6. 6.32 × 4 =
  7. 7.33 × 4 =
  8. 8.36 × 4 =
  9. 9.56 × 4 =
  10. 10.12 × 4 =
  11. 11.29 × 8 =
  12. 12.12 × 8 =
  13. 13.13 × 8 =
  14. 14.18 × 4 =
  15. 15.41 × 4 =
  16. 16.22 × 8 =
  17. 17.16 × 8 =
  18. 18.20 × 4 =
  19. 19.33 × 8 =
  20. 20.38 × 8 =
  21. 21.70 × 4 =
  22. 22.17 × 8 =
  23. 23.30 × 8 =
  24. 24.15 × 8 =
  25. 25.18 × 8 =
  26. 26.37 × 8 =
  27. 27.71 × 4 =
  28. 28.20 × 8 =
  29. 29.19 × 4 =
  30. 30.52 × 4 =
  31. 31.26 × 4 =
  32. 32.42 × 4 =
  33. 33.22 × 4 =
  34. 34.61 × 4 =
  35. 35.19 × 8 =
  36. 36.66 × 4 =
  37. 37.35 × 8 =
  38. 38.48 × 4 =
  39. 39.34 × 8 =
  40. 40.40 × 8 =

Answer key

  1. 224
  2. 116
  3. 312
  4. 136
  5. 256
  6. 128
  7. 132
  8. 144
  9. 224
  10. 48
  11. 232
  12. 96
  13. 104
  14. 72
  15. 164
  16. 176
  17. 128
  18. 80
  19. 264
  20. 304
  21. 280
  22. 136
  23. 240
  24. 120
  25. 144
  26. 296
  27. 284
  28. 160
  29. 76
  30. 208
  31. 104
  32. 168
  33. 88
  34. 244
  35. 152
  36. 264
  37. 280
  38. 192
  39. 272
  40. 320

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