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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 165 · 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. 1.15 × 8 =
  2. 2.40 × 8 =
  3. 3.39 × 8 =
  4. 4.36 × 8 =
  5. 5.14 × 8 =
  6. 6.22 × 8 =
  7. 7.37 × 8 =
  8. 8.24 × 4 =
  9. 9.67 × 4 =
  10. 10.75 × 4 =
  11. 11.30 × 4 =
  12. 12.21 × 8 =
  13. 13.15 × 4 =
  14. 14.71 × 4 =
  15. 15.13 × 4 =
  16. 16.12 × 8 =
  17. 17.33 × 4 =
  18. 18.28 × 8 =
  19. 19.16 × 4 =
  20. 20.55 × 4 =
  21. 21.13 × 8 =
  22. 22.53 × 4 =
  23. 23.19 × 4 =
  24. 24.22 × 4 =
  25. 25.42 × 4 =
  26. 26.37 × 4 =
  27. 27.26 × 8 =
  28. 28.32 × 8 =
  29. 29.21 × 4 =
  30. 30.46 × 4 =
  31. 31.43 × 4 =
  32. 32.57 × 4 =
  33. 33.19 × 8 =
  34. 34.23 × 8 =
  35. 35.34 × 8 =
  36. 36.12 × 4 =
  37. 37.27 × 4 =
  38. 38.27 × 8 =
  39. 39.63 × 4 =
  40. 40.47 × 4 =

Answer key

  1. 120
  2. 320
  3. 312
  4. 288
  5. 112
  6. 176
  7. 296
  8. 96
  9. 268
  10. 300
  11. 120
  12. 168
  13. 60
  14. 284
  15. 52
  16. 96
  17. 132
  18. 224
  19. 64
  20. 220
  21. 104
  22. 212
  23. 76
  24. 88
  25. 168
  26. 148
  27. 208
  28. 256
  29. 84
  30. 184
  31. 172
  32. 228
  33. 152
  34. 184
  35. 272
  36. 48
  37. 108
  38. 216
  39. 252
  40. 188

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