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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 434 · 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. 1.24 × 8 =
  2. 2.62 × 4 =
  3. 3.27 × 8 =
  4. 4.18 × 8 =
  5. 5.25 × 8 =
  6. 6.19 × 8 =
  7. 7.12 × 8 =
  8. 8.72 × 4 =
  9. 9.22 × 4 =
  10. 10.55 × 4 =
  11. 11.34 × 8 =
  12. 12.17 × 8 =
  13. 13.32 × 8 =
  14. 14.27 × 4 =
  15. 15.33 × 4 =
  16. 16.26 × 4 =
  17. 17.20 × 4 =
  18. 18.15 × 8 =
  19. 19.61 × 4 =
  20. 20.41 × 4 =
  21. 21.39 × 8 =
  22. 22.25 × 4 =
  23. 23.37 × 8 =
  24. 24.59 × 4 =
  25. 25.35 × 4 =
  26. 26.38 × 8 =
  27. 27.65 × 4 =
  28. 28.14 × 4 =
  29. 29.33 × 8 =
  30. 30.13 × 4 =
  31. 31.70 × 4 =
  32. 32.23 × 8 =
  33. 33.21 × 8 =
  34. 34.68 × 4 =
  35. 35.24 × 4 =
  36. 36.54 × 4 =
  37. 37.13 × 8 =
  38. 38.74 × 4 =
  39. 39.18 × 4 =
  40. 40.73 × 4 =

Answer key

  1. 192
  2. 248
  3. 216
  4. 144
  5. 200
  6. 152
  7. 96
  8. 288
  9. 88
  10. 220
  11. 272
  12. 136
  13. 256
  14. 108
  15. 132
  16. 104
  17. 80
  18. 120
  19. 244
  20. 164
  21. 312
  22. 100
  23. 296
  24. 236
  25. 140
  26. 304
  27. 260
  28. 56
  29. 264
  30. 52
  31. 280
  32. 184
  33. 168
  34. 272
  35. 96
  36. 216
  37. 104
  38. 296
  39. 72
  40. 292

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