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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 820 · 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. 1.43 × 4 =
  2. 2.41 × 4 =
  3. 3.16 × 8 =
  4. 4.21 × 4 =
  5. 5.12 × 8 =
  6. 6.28 × 8 =
  7. 7.21 × 8 =
  8. 8.39 × 4 =
  9. 9.24 × 4 =
  10. 10.27 × 4 =
  11. 11.53 × 4 =
  12. 12.39 × 8 =
  13. 13.27 × 8 =
  14. 14.16 × 4 =
  15. 15.75 × 4 =
  16. 16.71 × 4 =
  17. 17.34 × 8 =
  18. 18.60 × 4 =
  19. 19.15 × 4 =
  20. 20.68 × 4 =
  21. 21.18 × 4 =
  22. 22.17 × 8 =
  23. 23.48 × 4 =
  24. 24.55 × 4 =
  25. 25.47 × 4 =
  26. 26.74 × 4 =
  27. 27.28 × 4 =
  28. 28.22 × 8 =
  29. 29.20 × 4 =
  30. 30.24 × 8 =
  31. 31.61 × 4 =
  32. 32.34 × 4 =
  33. 33.26 × 4 =
  34. 34.37 × 8 =
  35. 35.26 × 8 =
  36. 36.46 × 4 =
  37. 37.50 × 4 =
  38. 38.19 × 8 =
  39. 39.69 × 4 =
  40. 40.14 × 4 =

Answer key

  1. 172
  2. 164
  3. 128
  4. 84
  5. 96
  6. 224
  7. 168
  8. 156
  9. 96
  10. 108
  11. 212
  12. 312
  13. 216
  14. 64
  15. 300
  16. 284
  17. 272
  18. 240
  19. 60
  20. 272
  21. 72
  22. 136
  23. 192
  24. 220
  25. 188
  26. 296
  27. 112
  28. 176
  29. 80
  30. 192
  31. 244
  32. 136
  33. 104
  34. 296
  35. 208
  36. 184
  37. 200
  38. 152
  39. 276
  40. 56

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