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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 72 · 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 × 8 =
  3. 3.26 × 4 =
  4. 4.23 × 4 =
  5. 5.19 × 8 =
  6. 6.36 × 8 =
  7. 7.17 × 8 =
  8. 8.15 × 4 =
  9. 9.21 × 4 =
  10. 10.32 × 8 =
  11. 11.40 × 8 =
  12. 12.68 × 4 =
  13. 13.27 × 4 =
  14. 14.37 × 4 =
  15. 15.20 × 8 =
  16. 16.26 × 8 =
  17. 17.32 × 4 =
  18. 18.69 × 4 =
  19. 19.22 × 8 =
  20. 20.31 × 4 =
  21. 21.56 × 4 =
  22. 22.24 × 4 =
  23. 23.41 × 4 =
  24. 24.59 × 4 =
  25. 25.71 × 4 =
  26. 26.60 × 4 =
  27. 27.73 × 4 =
  28. 28.39 × 4 =
  29. 29.30 × 4 =
  30. 30.19 × 4 =
  31. 31.46 × 4 =
  32. 32.16 × 8 =
  33. 33.52 × 4 =
  34. 34.15 × 8 =
  35. 35.30 × 8 =
  36. 36.27 × 8 =
  37. 37.13 × 8 =
  38. 38.72 × 4 =
  39. 39.39 × 8 =
  40. 40.21 × 8 =

Answer key

  1. 224
  2. 232
  3. 104
  4. 92
  5. 152
  6. 288
  7. 136
  8. 60
  9. 84
  10. 256
  11. 320
  12. 272
  13. 108
  14. 148
  15. 160
  16. 208
  17. 128
  18. 276
  19. 176
  20. 124
  21. 224
  22. 96
  23. 164
  24. 236
  25. 284
  26. 240
  27. 292
  28. 156
  29. 120
  30. 76
  31. 184
  32. 128
  33. 208
  34. 120
  35. 240
  36. 216
  37. 104
  38. 288
  39. 312
  40. 168

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