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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 725 · 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. 1.35 × 8 =
  2. 2.22 × 8 =
  3. 3.19 × 8 =
  4. 4.67 × 4 =
  5. 5.59 × 4 =
  6. 6.73 × 4 =
  7. 7.69 × 4 =
  8. 8.31 × 8 =
  9. 9.57 × 4 =
  10. 10.23 × 8 =
  11. 11.17 × 4 =
  12. 12.37 × 8 =
  13. 13.38 × 8 =
  14. 14.12 × 4 =
  15. 15.15 × 4 =
  16. 16.31 × 4 =
  17. 17.30 × 8 =
  18. 18.66 × 4 =
  19. 19.33 × 4 =
  20. 20.35 × 4 =
  21. 21.20 × 8 =
  22. 22.25 × 8 =
  23. 23.26 × 4 =
  24. 24.14 × 4 =
  25. 25.65 × 4 =
  26. 26.38 × 4 =
  27. 27.24 × 8 =
  28. 28.41 × 4 =
  29. 29.36 × 4 =
  30. 30.61 × 4 =
  31. 31.14 × 8 =
  32. 32.48 × 4 =
  33. 33.24 × 4 =
  34. 34.39 × 8 =
  35. 35.39 × 4 =
  36. 36.20 × 4 =
  37. 37.12 × 8 =
  38. 38.32 × 8 =
  39. 39.42 × 4 =
  40. 40.13 × 8 =

Answer key

  1. 280
  2. 176
  3. 152
  4. 268
  5. 236
  6. 292
  7. 276
  8. 248
  9. 228
  10. 184
  11. 68
  12. 296
  13. 304
  14. 48
  15. 60
  16. 124
  17. 240
  18. 264
  19. 132
  20. 140
  21. 160
  22. 200
  23. 104
  24. 56
  25. 260
  26. 152
  27. 192
  28. 164
  29. 144
  30. 244
  31. 112
  32. 192
  33. 96
  34. 312
  35. 156
  36. 80
  37. 96
  38. 256
  39. 168
  40. 104

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