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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 657 · 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. 1.68 × 4 =
  2. 2.36 × 8 =
  3. 3.28 × 4 =
  4. 4.37 × 8 =
  5. 5.20 × 4 =
  6. 6.75 × 4 =
  7. 7.43 × 4 =
  8. 8.19 × 8 =
  9. 9.48 × 4 =
  10. 10.15 × 8 =
  11. 11.62 × 4 =
  12. 12.17 × 8 =
  13. 13.16 × 8 =
  14. 14.21 × 8 =
  15. 15.65 × 4 =
  16. 16.23 × 4 =
  17. 17.22 × 8 =
  18. 18.13 × 8 =
  19. 19.36 × 4 =
  20. 20.58 × 4 =
  21. 21.53 × 4 =
  22. 22.35 × 8 =
  23. 23.66 × 4 =
  24. 24.35 × 4 =
  25. 25.25 × 4 =
  26. 26.23 × 8 =
  27. 27.27 × 8 =
  28. 28.41 × 4 =
  29. 29.60 × 4 =
  30. 30.46 × 4 =
  31. 31.39 × 8 =
  32. 32.32 × 4 =
  33. 33.34 × 8 =
  34. 34.12 × 8 =
  35. 35.29 × 8 =
  36. 36.29 × 4 =
  37. 37.15 × 4 =
  38. 38.27 × 4 =
  39. 39.63 × 4 =
  40. 40.17 × 4 =

Answer key

  1. 272
  2. 288
  3. 112
  4. 296
  5. 80
  6. 300
  7. 172
  8. 152
  9. 192
  10. 120
  11. 248
  12. 136
  13. 128
  14. 168
  15. 260
  16. 92
  17. 176
  18. 104
  19. 144
  20. 232
  21. 212
  22. 280
  23. 264
  24. 140
  25. 100
  26. 184
  27. 216
  28. 164
  29. 240
  30. 184
  31. 312
  32. 128
  33. 272
  34. 96
  35. 232
  36. 116
  37. 60
  38. 108
  39. 252
  40. 68

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