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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 418 · 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. 1.30 × 8 =
  2. 2.33 × 4 =
  3. 3.61 × 4 =
  4. 4.19 × 4 =
  5. 5.48 × 4 =
  6. 6.24 × 8 =
  7. 7.69 × 4 =
  8. 8.23 × 8 =
  9. 9.38 × 8 =
  10. 10.13 × 8 =
  11. 11.16 × 4 =
  12. 12.25 × 8 =
  13. 13.16 × 8 =
  14. 14.45 × 4 =
  15. 15.42 × 4 =
  16. 16.26 × 4 =
  17. 17.27 × 4 =
  18. 18.34 × 8 =
  19. 19.43 × 4 =
  20. 20.20 × 8 =
  21. 21.38 × 4 =
  22. 22.21 × 4 =
  23. 23.74 × 4 =
  24. 24.18 × 8 =
  25. 25.17 × 4 =
  26. 26.14 × 8 =
  27. 27.24 × 4 =
  28. 28.29 × 4 =
  29. 29.15 × 8 =
  30. 30.33 × 8 =
  31. 31.19 × 8 =
  32. 32.15 × 4 =
  33. 33.26 × 8 =
  34. 34.34 × 4 =
  35. 35.32 × 8 =
  36. 36.39 × 8 =
  37. 37.53 × 4 =
  38. 38.72 × 4 =
  39. 39.59 × 4 =
  40. 40.14 × 4 =

Answer key

  1. 240
  2. 132
  3. 244
  4. 76
  5. 192
  6. 192
  7. 276
  8. 184
  9. 304
  10. 104
  11. 64
  12. 200
  13. 128
  14. 180
  15. 168
  16. 104
  17. 108
  18. 272
  19. 172
  20. 160
  21. 152
  22. 84
  23. 296
  24. 144
  25. 68
  26. 112
  27. 96
  28. 116
  29. 120
  30. 264
  31. 152
  32. 60
  33. 208
  34. 136
  35. 256
  36. 312
  37. 212
  38. 288
  39. 236
  40. 56

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