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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 296 · 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. 1.31 × 4 =
  2. 2.59 × 4 =
  3. 3.20 × 8 =
  4. 4.15 × 4 =
  5. 5.32 × 8 =
  6. 6.14 × 8 =
  7. 7.65 × 4 =
  8. 8.22 × 4 =
  9. 9.52 × 4 =
  10. 10.41 × 4 =
  11. 11.24 × 8 =
  12. 12.17 × 8 =
  13. 13.19 × 4 =
  14. 14.26 × 4 =
  15. 15.21 × 4 =
  16. 16.20 × 4 =
  17. 17.37 × 8 =
  18. 18.27 × 8 =
  19. 19.67 × 4 =
  20. 20.35 × 4 =
  21. 21.33 × 8 =
  22. 22.27 × 4 =
  23. 23.15 × 8 =
  24. 24.22 × 8 =
  25. 25.17 × 4 =
  26. 26.26 × 8 =
  27. 27.48 × 4 =
  28. 28.45 × 4 =
  29. 29.14 × 4 =
  30. 30.12 × 8 =
  31. 31.18 × 8 =
  32. 32.43 × 4 =
  33. 33.30 × 4 =
  34. 34.53 × 4 =
  35. 35.18 × 4 =
  36. 36.12 × 4 =
  37. 37.51 × 4 =
  38. 38.60 × 4 =
  39. 39.38 × 8 =
  40. 40.36 × 8 =

Answer key

  1. 124
  2. 236
  3. 160
  4. 60
  5. 256
  6. 112
  7. 260
  8. 88
  9. 208
  10. 164
  11. 192
  12. 136
  13. 76
  14. 104
  15. 84
  16. 80
  17. 296
  18. 216
  19. 268
  20. 140
  21. 264
  22. 108
  23. 120
  24. 176
  25. 68
  26. 208
  27. 192
  28. 180
  29. 56
  30. 96
  31. 144
  32. 172
  33. 120
  34. 212
  35. 72
  36. 48
  37. 204
  38. 240
  39. 304
  40. 288

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