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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 243 · 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. 1.24 × 4 =
  2. 2.30 × 4 =
  3. 3.41 × 4 =
  4. 4.30 × 8 =
  5. 5.13 × 4 =
  6. 6.46 × 4 =
  7. 7.23 × 4 =
  8. 8.23 × 8 =
  9. 9.20 × 4 =
  10. 10.64 × 4 =
  11. 11.22 × 4 =
  12. 12.34 × 4 =
  13. 13.47 × 4 =
  14. 14.28 × 8 =
  15. 15.70 × 4 =
  16. 16.38 × 8 =
  17. 17.51 × 4 =
  18. 18.25 × 8 =
  19. 19.22 × 8 =
  20. 20.20 × 8 =
  21. 21.17 × 4 =
  22. 22.27 × 8 =
  23. 23.73 × 4 =
  24. 24.31 × 4 =
  25. 25.67 × 4 =
  26. 26.60 × 4 =
  27. 27.15 × 4 =
  28. 28.58 × 4 =
  29. 29.39 × 8 =
  30. 30.15 × 8 =
  31. 31.33 × 8 =
  32. 32.56 × 4 =
  33. 33.48 × 4 =
  34. 34.21 × 4 =
  35. 35.37 × 8 =
  36. 36.40 × 4 =
  37. 37.36 × 8 =
  38. 38.34 × 8 =
  39. 39.12 × 4 =
  40. 40.16 × 8 =

Answer key

  1. 96
  2. 120
  3. 164
  4. 240
  5. 52
  6. 184
  7. 92
  8. 184
  9. 80
  10. 256
  11. 88
  12. 136
  13. 188
  14. 224
  15. 280
  16. 304
  17. 204
  18. 200
  19. 176
  20. 160
  21. 68
  22. 216
  23. 292
  24. 124
  25. 268
  26. 240
  27. 60
  28. 232
  29. 312
  30. 120
  31. 264
  32. 224
  33. 192
  34. 84
  35. 296
  36. 160
  37. 288
  38. 272
  39. 48
  40. 128

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