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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 466 · 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. 2.13 × 8 =
  3. 3.25 × 8 =
  4. 4.33 × 8 =
  5. 5.27 × 8 =
  6. 6.27 × 4 =
  7. 7.34 × 8 =
  8. 8.46 × 4 =
  9. 9.42 × 4 =
  10. 10.20 × 8 =
  11. 11.14 × 8 =
  12. 12.32 × 8 =
  13. 13.18 × 8 =
  14. 14.38 × 8 =
  15. 15.72 × 4 =
  16. 16.21 × 4 =
  17. 17.69 × 4 =
  18. 18.40 × 8 =
  19. 19.24 × 4 =
  20. 20.29 × 4 =
  21. 21.35 × 8 =
  22. 22.16 × 8 =
  23. 23.18 × 4 =
  24. 24.61 × 4 =
  25. 25.12 × 8 =
  26. 26.73 × 4 =
  27. 27.31 × 8 =
  28. 28.25 × 4 =
  29. 29.36 × 8 =
  30. 30.59 × 4 =
  31. 31.15 × 8 =
  32. 32.71 × 4 =
  33. 33.30 × 4 =
  34. 34.17 × 4 =
  35. 35.34 × 4 =
  36. 36.57 × 4 =
  37. 37.36 × 4 =
  38. 38.26 × 8 =
  39. 39.23 × 8 =
  40. 40.17 × 8 =

Answer key

  1. 240
  2. 104
  3. 200
  4. 264
  5. 216
  6. 108
  7. 272
  8. 184
  9. 168
  10. 160
  11. 112
  12. 256
  13. 144
  14. 304
  15. 288
  16. 84
  17. 276
  18. 320
  19. 96
  20. 116
  21. 280
  22. 128
  23. 72
  24. 244
  25. 96
  26. 292
  27. 248
  28. 100
  29. 288
  30. 236
  31. 120
  32. 284
  33. 120
  34. 68
  35. 136
  36. 228
  37. 144
  38. 208
  39. 184
  40. 136

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