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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 634 · 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. 1.17 × 4 =
  2. 2.26 × 8 =
  3. 3.26 × 4 =
  4. 4.38 × 8 =
  5. 5.48 × 4 =
  6. 6.14 × 8 =
  7. 7.59 × 4 =
  8. 8.34 × 8 =
  9. 9.72 × 4 =
  10. 10.40 × 8 =
  11. 11.49 × 4 =
  12. 12.25 × 4 =
  13. 13.15 × 4 =
  14. 14.25 × 8 =
  15. 15.30 × 8 =
  16. 16.31 × 8 =
  17. 17.39 × 4 =
  18. 18.19 × 4 =
  19. 19.71 × 4 =
  20. 20.55 × 4 =
  21. 21.39 × 8 =
  22. 22.13 × 4 =
  23. 23.18 × 4 =
  24. 24.20 × 4 =
  25. 25.34 × 4 =
  26. 26.41 × 4 =
  27. 27.19 × 8 =
  28. 28.52 × 4 =
  29. 29.32 × 8 =
  30. 30.35 × 8 =
  31. 31.22 × 4 =
  32. 32.16 × 4 =
  33. 33.69 × 4 =
  34. 34.35 × 4 =
  35. 35.16 × 8 =
  36. 36.32 × 4 =
  37. 37.18 × 8 =
  38. 38.36 × 8 =
  39. 39.50 × 4 =
  40. 40.20 × 8 =

Answer key

  1. 68
  2. 208
  3. 104
  4. 304
  5. 192
  6. 112
  7. 236
  8. 272
  9. 288
  10. 320
  11. 196
  12. 100
  13. 60
  14. 200
  15. 240
  16. 248
  17. 156
  18. 76
  19. 284
  20. 220
  21. 312
  22. 52
  23. 72
  24. 80
  25. 136
  26. 164
  27. 152
  28. 208
  29. 256
  30. 280
  31. 88
  32. 64
  33. 276
  34. 140
  35. 128
  36. 128
  37. 144
  38. 288
  39. 200
  40. 160

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