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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 225 · 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. 1.21 × 4 =
  2. 2.17 × 8 =
  3. 3.60 × 4 =
  4. 4.48 × 4 =
  5. 5.28 × 8 =
  6. 6.13 × 8 =
  7. 7.18 × 8 =
  8. 8.26 × 8 =
  9. 9.24 × 8 =
  10. 10.17 × 4 =
  11. 11.35 × 8 =
  12. 12.15 × 8 =
  13. 13.19 × 8 =
  14. 14.39 × 8 =
  15. 15.63 × 4 =
  16. 16.33 × 8 =
  17. 17.75 × 4 =
  18. 18.20 × 8 =
  19. 19.14 × 8 =
  20. 20.24 × 4 =
  21. 21.58 × 4 =
  22. 22.32 × 4 =
  23. 23.21 × 8 =
  24. 24.20 × 4 =
  25. 25.14 × 4 =
  26. 26.49 × 4 =
  27. 27.29 × 8 =
  28. 28.30 × 8 =
  29. 29.27 × 8 =
  30. 30.50 × 4 =
  31. 31.23 × 8 =
  32. 32.68 × 4 =
  33. 33.31 × 8 =
  34. 34.25 × 8 =
  35. 35.34 × 8 =
  36. 36.41 × 4 =
  37. 37.26 × 4 =
  38. 38.53 × 4 =
  39. 39.16 × 8 =
  40. 40.38 × 8 =

Answer key

  1. 84
  2. 136
  3. 240
  4. 192
  5. 224
  6. 104
  7. 144
  8. 208
  9. 192
  10. 68
  11. 280
  12. 120
  13. 152
  14. 312
  15. 252
  16. 264
  17. 300
  18. 160
  19. 112
  20. 96
  21. 232
  22. 128
  23. 168
  24. 80
  25. 56
  26. 196
  27. 232
  28. 240
  29. 216
  30. 200
  31. 184
  32. 272
  33. 248
  34. 200
  35. 272
  36. 164
  37. 104
  38. 212
  39. 128
  40. 304

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