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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 843 · 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. 2.18 × 8 =
  3. 3.18 × 4 =
  4. 4.53 × 4 =
  5. 5.40 × 8 =
  6. 6.35 × 4 =
  7. 7.15 × 4 =
  8. 8.68 × 4 =
  9. 9.44 × 4 =
  10. 10.37 × 4 =
  11. 11.72 × 4 =
  12. 12.24 × 8 =
  13. 13.15 × 8 =
  14. 14.22 × 8 =
  15. 15.52 × 4 =
  16. 16.19 × 8 =
  17. 17.57 × 4 =
  18. 18.48 × 4 =
  19. 19.43 × 4 =
  20. 20.16 × 4 =
  21. 21.14 × 4 =
  22. 22.17 × 8 =
  23. 23.25 × 4 =
  24. 24.46 × 4 =
  25. 25.27 × 4 =
  26. 26.28 × 4 =
  27. 27.34 × 8 =
  28. 28.12 × 8 =
  29. 29.64 × 4 =
  30. 30.35 × 8 =
  31. 31.36 × 4 =
  32. 32.22 × 4 =
  33. 33.19 × 4 =
  34. 34.47 × 4 =
  35. 35.13 × 8 =
  36. 36.26 × 4 =
  37. 37.33 × 8 =
  38. 38.32 × 4 =
  39. 39.36 × 8 =
  40. 40.20 × 8 =

Answer key

  1. 208
  2. 144
  3. 72
  4. 212
  5. 320
  6. 140
  7. 60
  8. 272
  9. 176
  10. 148
  11. 288
  12. 192
  13. 120
  14. 176
  15. 208
  16. 152
  17. 228
  18. 192
  19. 172
  20. 64
  21. 56
  22. 136
  23. 100
  24. 184
  25. 108
  26. 112
  27. 272
  28. 96
  29. 256
  30. 280
  31. 144
  32. 88
  33. 76
  34. 188
  35. 104
  36. 104
  37. 264
  38. 128
  39. 288
  40. 160

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