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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 746 · 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. 1.38 × 8 =
  2. 2.16 × 8 =
  3. 3.44 × 4 =
  4. 4.12 × 8 =
  5. 5.13 × 4 =
  6. 6.14 × 4 =
  7. 7.15 × 4 =
  8. 8.57 × 4 =
  9. 9.13 × 8 =
  10. 10.39 × 4 =
  11. 11.33 × 4 =
  12. 12.52 × 4 =
  13. 13.36 × 8 =
  14. 14.17 × 4 =
  15. 15.19 × 8 =
  16. 16.51 × 4 =
  17. 17.34 × 8 =
  18. 18.72 × 4 =
  19. 19.26 × 8 =
  20. 20.32 × 8 =
  21. 21.37 × 8 =
  22. 22.59 × 4 =
  23. 23.20 × 4 =
  24. 24.70 × 4 =
  25. 25.37 × 4 =
  26. 26.17 × 8 =
  27. 27.12 × 4 =
  28. 28.35 × 8 =
  29. 29.15 × 8 =
  30. 30.30 × 4 =
  31. 31.20 × 8 =
  32. 32.69 × 4 =
  33. 33.23 × 8 =
  34. 34.28 × 8 =
  35. 35.14 × 8 =
  36. 36.35 × 4 =
  37. 37.48 × 4 =
  38. 38.18 × 4 =
  39. 39.41 × 4 =
  40. 40.21 × 4 =

Answer key

  1. 304
  2. 128
  3. 176
  4. 96
  5. 52
  6. 56
  7. 60
  8. 228
  9. 104
  10. 156
  11. 132
  12. 208
  13. 288
  14. 68
  15. 152
  16. 204
  17. 272
  18. 288
  19. 208
  20. 256
  21. 296
  22. 236
  23. 80
  24. 280
  25. 148
  26. 136
  27. 48
  28. 280
  29. 120
  30. 120
  31. 160
  32. 276
  33. 184
  34. 224
  35. 112
  36. 140
  37. 192
  38. 72
  39. 164
  40. 84

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