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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 615 · 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. 1.26 × 8 =
  2. 2.39 × 8 =
  3. 3.21 × 4 =
  4. 4.50 × 4 =
  5. 5.31 × 8 =
  6. 6.38 × 8 =
  7. 7.65 × 4 =
  8. 8.57 × 4 =
  9. 9.64 × 4 =
  10. 10.35 × 8 =
  11. 11.12 × 4 =
  12. 12.19 × 4 =
  13. 13.36 × 4 =
  14. 14.34 × 8 =
  15. 15.32 × 8 =
  16. 16.28 × 8 =
  17. 17.12 × 8 =
  18. 18.53 × 4 =
  19. 19.15 × 4 =
  20. 20.13 × 4 =
  21. 21.27 × 8 =
  22. 22.17 × 8 =
  23. 23.62 × 4 =
  24. 24.70 × 4 =
  25. 25.32 × 4 =
  26. 26.16 × 8 =
  27. 27.18 × 4 =
  28. 28.34 × 4 =
  29. 29.59 × 4 =
  30. 30.30 × 8 =
  31. 31.22 × 8 =
  32. 32.42 × 4 =
  33. 33.15 × 8 =
  34. 34.51 × 4 =
  35. 35.24 × 4 =
  36. 36.68 × 4 =
  37. 37.46 × 4 =
  38. 38.17 × 4 =
  39. 39.27 × 4 =
  40. 40.30 × 4 =

Answer key

  1. 208
  2. 312
  3. 84
  4. 200
  5. 248
  6. 304
  7. 260
  8. 228
  9. 256
  10. 280
  11. 48
  12. 76
  13. 144
  14. 272
  15. 256
  16. 224
  17. 96
  18. 212
  19. 60
  20. 52
  21. 216
  22. 136
  23. 248
  24. 280
  25. 128
  26. 128
  27. 72
  28. 136
  29. 236
  30. 240
  31. 176
  32. 168
  33. 120
  34. 204
  35. 96
  36. 272
  37. 184
  38. 68
  39. 108
  40. 120

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