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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 168 · 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. 1.17 × 8 =
  2. 2.51 × 4 =
  3. 3.35 × 4 =
  4. 4.32 × 8 =
  5. 5.22 × 8 =
  6. 6.31 × 8 =
  7. 7.14 × 4 =
  8. 8.23 × 8 =
  9. 9.27 × 4 =
  10. 10.50 × 4 =
  11. 11.24 × 4 =
  12. 12.39 × 8 =
  13. 13.12 × 4 =
  14. 14.53 × 4 =
  15. 15.33 × 4 =
  16. 16.48 × 4 =
  17. 17.21 × 4 =
  18. 18.30 × 8 =
  19. 19.38 × 4 =
  20. 20.28 × 8 =
  21. 21.31 × 4 =
  22. 22.17 × 4 =
  23. 23.19 × 8 =
  24. 24.15 × 8 =
  25. 25.55 × 4 =
  26. 26.47 × 4 =
  27. 27.18 × 8 =
  28. 28.60 × 4 =
  29. 29.22 × 4 =
  30. 30.19 × 4 =
  31. 31.13 × 8 =
  32. 32.40 × 8 =
  33. 33.44 × 4 =
  34. 34.30 × 4 =
  35. 35.16 × 8 =
  36. 36.34 × 4 =
  37. 37.23 × 4 =
  38. 38.37 × 8 =
  39. 39.34 × 8 =
  40. 40.29 × 8 =

Answer key

  1. 136
  2. 204
  3. 140
  4. 256
  5. 176
  6. 248
  7. 56
  8. 184
  9. 108
  10. 200
  11. 96
  12. 312
  13. 48
  14. 212
  15. 132
  16. 192
  17. 84
  18. 240
  19. 152
  20. 224
  21. 124
  22. 68
  23. 152
  24. 120
  25. 220
  26. 188
  27. 144
  28. 240
  29. 88
  30. 76
  31. 104
  32. 320
  33. 176
  34. 120
  35. 128
  36. 136
  37. 92
  38. 296
  39. 272
  40. 232

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