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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 703 · 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. 1.75 × 4 =
  2. 2.23 × 8 =
  3. 3.69 × 4 =
  4. 4.16 × 8 =
  5. 5.58 × 4 =
  6. 6.13 × 4 =
  7. 7.39 × 8 =
  8. 8.15 × 8 =
  9. 9.27 × 4 =
  10. 10.28 × 4 =
  11. 11.34 × 8 =
  12. 12.37 × 4 =
  13. 13.27 × 8 =
  14. 14.20 × 8 =
  15. 15.21 × 8 =
  16. 16.15 × 4 =
  17. 17.13 × 8 =
  18. 18.23 × 4 =
  19. 19.33 × 8 =
  20. 20.64 × 4 =
  21. 21.26 × 8 =
  22. 22.40 × 8 =
  23. 23.36 × 8 =
  24. 24.35 × 8 =
  25. 25.14 × 8 =
  26. 26.59 × 4 =
  27. 27.41 × 4 =
  28. 28.71 × 4 =
  29. 29.48 × 4 =
  30. 30.55 × 4 =
  31. 31.18 × 8 =
  32. 32.12 × 8 =
  33. 33.16 × 4 =
  34. 34.73 × 4 =
  35. 35.25 × 8 =
  36. 36.22 × 8 =
  37. 37.20 × 4 =
  38. 38.19 × 4 =
  39. 39.30 × 8 =
  40. 40.67 × 4 =

Answer key

  1. 300
  2. 184
  3. 276
  4. 128
  5. 232
  6. 52
  7. 312
  8. 120
  9. 108
  10. 112
  11. 272
  12. 148
  13. 216
  14. 160
  15. 168
  16. 60
  17. 104
  18. 92
  19. 264
  20. 256
  21. 208
  22. 320
  23. 288
  24. 280
  25. 112
  26. 236
  27. 164
  28. 284
  29. 192
  30. 220
  31. 144
  32. 96
  33. 64
  34. 292
  35. 200
  36. 176
  37. 80
  38. 76
  39. 240
  40. 268

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