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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 127 · 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. 1.12 × 8 =
  2. 2.21 × 8 =
  3. 3.39 × 4 =
  4. 4.16 × 8 =
  5. 5.22 × 4 =
  6. 6.69 × 4 =
  7. 7.13 × 4 =
  8. 8.23 × 8 =
  9. 9.35 × 8 =
  10. 10.18 × 8 =
  11. 11.37 × 8 =
  12. 12.31 × 4 =
  13. 13.15 × 4 =
  14. 14.32 × 4 =
  15. 15.19 × 8 =
  16. 16.17 × 8 =
  17. 17.55 × 4 =
  18. 18.71 × 4 =
  19. 19.34 × 4 =
  20. 20.14 × 8 =
  21. 21.29 × 8 =
  22. 22.24 × 8 =
  23. 23.63 × 4 =
  24. 24.25 × 4 =
  25. 25.58 × 4 =
  26. 26.30 × 8 =
  27. 27.36 × 4 =
  28. 28.29 × 4 =
  29. 29.34 × 8 =
  30. 30.40 × 4 =
  31. 31.28 × 4 =
  32. 32.33 × 8 =
  33. 33.74 × 4 =
  34. 34.64 × 4 =
  35. 35.40 × 8 =
  36. 36.38 × 8 =
  37. 37.73 × 4 =
  38. 38.22 × 8 =
  39. 39.21 × 4 =
  40. 40.50 × 4 =

Answer key

  1. 96
  2. 168
  3. 156
  4. 128
  5. 88
  6. 276
  7. 52
  8. 184
  9. 280
  10. 144
  11. 296
  12. 124
  13. 60
  14. 128
  15. 152
  16. 136
  17. 220
  18. 284
  19. 136
  20. 112
  21. 232
  22. 192
  23. 252
  24. 100
  25. 232
  26. 240
  27. 144
  28. 116
  29. 272
  30. 160
  31. 112
  32. 264
  33. 296
  34. 256
  35. 320
  36. 304
  37. 292
  38. 176
  39. 84
  40. 200

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