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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 510 · 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. 1.12 × 8 =
  2. 2.17 × 8 =
  3. 3.29 × 8 =
  4. 4.63 × 4 =
  5. 5.27 × 8 =
  6. 6.35 × 4 =
  7. 7.44 × 4 =
  8. 8.73 × 4 =
  9. 9.55 × 4 =
  10. 10.68 × 4 =
  11. 11.53 × 4 =
  12. 12.26 × 8 =
  13. 13.52 × 4 =
  14. 14.16 × 8 =
  15. 15.31 × 8 =
  16. 16.16 × 4 =
  17. 17.12 × 4 =
  18. 18.38 × 8 =
  19. 19.20 × 4 =
  20. 20.71 × 4 =
  21. 21.18 × 8 =
  22. 22.24 × 4 =
  23. 23.48 × 4 =
  24. 24.19 × 4 =
  25. 25.28 × 4 =
  26. 26.34 × 8 =
  27. 27.33 × 8 =
  28. 28.23 × 4 =
  29. 29.22 × 8 =
  30. 30.15 × 8 =
  31. 31.27 × 4 =
  32. 32.46 × 4 =
  33. 33.38 × 4 =
  34. 34.21 × 4 =
  35. 35.58 × 4 =
  36. 36.14 × 4 =
  37. 37.13 × 8 =
  38. 38.72 × 4 =
  39. 39.45 × 4 =
  40. 40.40 × 8 =

Answer key

  1. 96
  2. 136
  3. 232
  4. 252
  5. 216
  6. 140
  7. 176
  8. 292
  9. 220
  10. 272
  11. 212
  12. 208
  13. 208
  14. 128
  15. 248
  16. 64
  17. 48
  18. 304
  19. 80
  20. 284
  21. 144
  22. 96
  23. 192
  24. 76
  25. 112
  26. 272
  27. 264
  28. 92
  29. 176
  30. 120
  31. 108
  32. 184
  33. 152
  34. 84
  35. 232
  36. 56
  37. 104
  38. 288
  39. 180
  40. 320

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