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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 106 · 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. 1.43 × 4 =
  2. 2.20 × 8 =
  3. 3.14 × 8 =
  4. 4.14 × 4 =
  5. 5.28 × 8 =
  6. 6.26 × 8 =
  7. 7.36 × 8 =
  8. 8.73 × 4 =
  9. 9.12 × 8 =
  10. 10.75 × 4 =
  11. 11.40 × 8 =
  12. 12.32 × 8 =
  13. 13.21 × 8 =
  14. 14.13 × 4 =
  15. 15.60 × 4 =
  16. 16.37 × 8 =
  17. 17.27 × 8 =
  18. 18.47 × 4 =
  19. 19.34 × 4 =
  20. 20.71 × 4 =
  21. 21.18 × 4 =
  22. 22.25 × 4 =
  23. 23.39 × 8 =
  24. 24.51 × 4 =
  25. 25.34 × 8 =
  26. 26.13 × 8 =
  27. 27.20 × 4 =
  28. 28.35 × 8 =
  29. 29.15 × 8 =
  30. 30.24 × 8 =
  31. 31.44 × 4 =
  32. 32.56 × 4 =
  33. 33.48 × 4 =
  34. 34.16 × 4 =
  35. 35.25 × 8 =
  36. 36.58 × 4 =
  37. 37.24 × 4 =
  38. 38.16 × 8 =
  39. 39.27 × 4 =
  40. 40.30 × 8 =

Answer key

  1. 172
  2. 160
  3. 112
  4. 56
  5. 224
  6. 208
  7. 288
  8. 292
  9. 96
  10. 300
  11. 320
  12. 256
  13. 168
  14. 52
  15. 240
  16. 296
  17. 216
  18. 188
  19. 136
  20. 284
  21. 72
  22. 100
  23. 312
  24. 204
  25. 272
  26. 104
  27. 80
  28. 280
  29. 120
  30. 192
  31. 176
  32. 224
  33. 192
  34. 64
  35. 200
  36. 232
  37. 96
  38. 128
  39. 108
  40. 240

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