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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 853 · 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. 1.22 × 8 =
  2. 2.24 × 8 =
  3. 3.24 × 4 =
  4. 4.14 × 8 =
  5. 5.39 × 8 =
  6. 6.37 × 4 =
  7. 7.37 × 8 =
  8. 8.41 × 4 =
  9. 9.27 × 8 =
  10. 10.29 × 8 =
  11. 11.21 × 4 =
  12. 12.17 × 8 =
  13. 13.12 × 8 =
  14. 14.70 × 4 =
  15. 15.20 × 4 =
  16. 16.31 × 8 =
  17. 17.52 × 4 =
  18. 18.20 × 8 =
  19. 19.43 × 4 =
  20. 20.16 × 8 =
  21. 21.19 × 8 =
  22. 22.13 × 8 =
  23. 23.27 × 4 =
  24. 24.73 × 4 =
  25. 25.14 × 4 =
  26. 26.13 × 4 =
  27. 27.21 × 8 =
  28. 28.15 × 8 =
  29. 29.25 × 8 =
  30. 30.23 × 8 =
  31. 31.35 × 8 =
  32. 32.36 × 4 =
  33. 33.54 × 4 =
  34. 34.60 × 4 =
  35. 35.53 × 4 =
  36. 36.33 × 8 =
  37. 37.26 × 4 =
  38. 38.57 × 4 =
  39. 39.16 × 4 =
  40. 40.44 × 4 =

Answer key

  1. 176
  2. 192
  3. 96
  4. 112
  5. 312
  6. 148
  7. 296
  8. 164
  9. 216
  10. 232
  11. 84
  12. 136
  13. 96
  14. 280
  15. 80
  16. 248
  17. 208
  18. 160
  19. 172
  20. 128
  21. 152
  22. 104
  23. 108
  24. 292
  25. 56
  26. 52
  27. 168
  28. 120
  29. 200
  30. 184
  31. 280
  32. 144
  33. 216
  34. 240
  35. 212
  36. 264
  37. 104
  38. 228
  39. 64
  40. 176

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