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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 613 · 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. 1.32 × 8 =
  2. 2.42 × 4 =
  3. 3.15 × 8 =
  4. 4.16 × 4 =
  5. 5.33 × 4 =
  6. 6.16 × 8 =
  7. 7.23 × 8 =
  8. 8.48 × 4 =
  9. 9.38 × 8 =
  10. 10.49 × 4 =
  11. 11.12 × 4 =
  12. 12.12 × 8 =
  13. 13.23 × 4 =
  14. 14.56 × 4 =
  15. 15.19 × 4 =
  16. 16.39 × 8 =
  17. 17.75 × 4 =
  18. 18.20 × 8 =
  19. 19.35 × 4 =
  20. 20.33 × 8 =
  21. 21.27 × 4 =
  22. 22.24 × 8 =
  23. 23.74 × 4 =
  24. 24.14 × 4 =
  25. 25.36 × 8 =
  26. 26.30 × 4 =
  27. 27.51 × 4 =
  28. 28.40 × 8 =
  29. 29.24 × 4 =
  30. 30.21 × 4 =
  31. 31.17 × 4 =
  32. 32.55 × 4 =
  33. 33.13 × 4 =
  34. 34.52 × 4 =
  35. 35.27 × 8 =
  36. 36.34 × 8 =
  37. 37.45 × 4 =
  38. 38.28 × 4 =
  39. 39.22 × 8 =
  40. 40.17 × 8 =

Answer key

  1. 256
  2. 168
  3. 120
  4. 64
  5. 132
  6. 128
  7. 184
  8. 192
  9. 304
  10. 196
  11. 48
  12. 96
  13. 92
  14. 224
  15. 76
  16. 312
  17. 300
  18. 160
  19. 140
  20. 264
  21. 108
  22. 192
  23. 296
  24. 56
  25. 288
  26. 120
  27. 204
  28. 320
  29. 96
  30. 84
  31. 68
  32. 220
  33. 52
  34. 208
  35. 216
  36. 272
  37. 180
  38. 112
  39. 176
  40. 136

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