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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 504 · 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. 1.25 × 8 =
  2. 2.30 × 8 =
  3. 3.13 × 8 =
  4. 4.15 × 8 =
  5. 5.16 × 4 =
  6. 6.12 × 4 =
  7. 7.16 × 8 =
  8. 8.31 × 8 =
  9. 9.53 × 4 =
  10. 10.23 × 8 =
  11. 11.34 × 8 =
  12. 12.24 × 8 =
  13. 13.22 × 8 =
  14. 14.71 × 4 =
  15. 15.36 × 8 =
  16. 16.28 × 4 =
  17. 17.15 × 4 =
  18. 18.41 × 4 =
  19. 19.56 × 4 =
  20. 20.45 × 4 =
  21. 21.35 × 4 =
  22. 22.64 × 4 =
  23. 23.19 × 4 =
  24. 24.12 × 8 =
  25. 25.33 × 8 =
  26. 26.50 × 4 =
  27. 27.21 × 8 =
  28. 28.14 × 8 =
  29. 29.37 × 8 =
  30. 30.40 × 8 =
  31. 31.31 × 4 =
  32. 32.48 × 4 =
  33. 33.27 × 4 =
  34. 34.29 × 4 =
  35. 35.47 × 4 =
  36. 36.13 × 4 =
  37. 37.14 × 4 =
  38. 38.17 × 8 =
  39. 39.57 × 4 =
  40. 40.28 × 8 =

Answer key

  1. 200
  2. 240
  3. 104
  4. 120
  5. 64
  6. 48
  7. 128
  8. 248
  9. 212
  10. 184
  11. 272
  12. 192
  13. 176
  14. 284
  15. 288
  16. 112
  17. 60
  18. 164
  19. 224
  20. 180
  21. 140
  22. 256
  23. 76
  24. 96
  25. 264
  26. 200
  27. 168
  28. 112
  29. 296
  30. 320
  31. 124
  32. 192
  33. 108
  34. 116
  35. 188
  36. 52
  37. 56
  38. 136
  39. 228
  40. 224

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