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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 673 · 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. 1.75 × 4 =
  2. 2.46 × 4 =
  3. 3.22 × 4 =
  4. 4.37 × 8 =
  5. 5.40 × 4 =
  6. 6.66 × 4 =
  7. 7.13 × 4 =
  8. 8.41 × 4 =
  9. 9.12 × 8 =
  10. 10.20 × 4 =
  11. 11.38 × 4 =
  12. 12.27 × 8 =
  13. 13.18 × 8 =
  14. 14.30 × 8 =
  15. 15.58 × 4 =
  16. 16.27 × 4 =
  17. 17.28 × 8 =
  18. 18.34 × 8 =
  19. 19.39 × 4 =
  20. 20.23 × 4 =
  21. 21.54 × 4 =
  22. 22.29 × 8 =
  23. 23.17 × 4 =
  24. 24.32 × 4 =
  25. 25.16 × 4 =
  26. 26.40 × 8 =
  27. 27.39 × 8 =
  28. 28.26 × 8 =
  29. 29.62 × 4 =
  30. 30.23 × 8 =
  31. 31.18 × 4 =
  32. 32.25 × 8 =
  33. 33.34 × 4 =
  34. 34.30 × 4 =
  35. 35.24 × 4 =
  36. 36.20 × 8 =
  37. 37.16 × 8 =
  38. 38.56 × 4 =
  39. 39.48 × 4 =
  40. 40.17 × 8 =

Answer key

  1. 300
  2. 184
  3. 88
  4. 296
  5. 160
  6. 264
  7. 52
  8. 164
  9. 96
  10. 80
  11. 152
  12. 216
  13. 144
  14. 240
  15. 232
  16. 108
  17. 224
  18. 272
  19. 156
  20. 92
  21. 216
  22. 232
  23. 68
  24. 128
  25. 64
  26. 320
  27. 312
  28. 208
  29. 248
  30. 184
  31. 72
  32. 200
  33. 136
  34. 120
  35. 96
  36. 160
  37. 128
  38. 224
  39. 192
  40. 136

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