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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 147 · 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. 1.62 × 4 =
  2. 2.16 × 8 =
  3. 3.40 × 4 =
  4. 4.31 × 8 =
  5. 5.13 × 4 =
  6. 6.19 × 8 =
  7. 7.64 × 4 =
  8. 8.37 × 8 =
  9. 9.38 × 8 =
  10. 10.39 × 8 =
  11. 11.20 × 4 =
  12. 12.38 × 4 =
  13. 13.13 × 8 =
  14. 14.15 × 4 =
  15. 15.54 × 4 =
  16. 16.41 × 4 =
  17. 17.15 × 8 =
  18. 18.55 × 4 =
  19. 19.45 × 4 =
  20. 20.40 × 8 =
  21. 21.12 × 4 =
  22. 22.73 × 4 =
  23. 23.50 × 4 =
  24. 24.14 × 4 =
  25. 25.32 × 8 =
  26. 26.74 × 4 =
  27. 27.43 × 4 =
  28. 28.27 × 8 =
  29. 29.23 × 8 =
  30. 30.17 × 8 =
  31. 31.25 × 8 =
  32. 32.29 × 4 =
  33. 33.20 × 8 =
  34. 34.56 × 4 =
  35. 35.30 × 8 =
  36. 36.19 × 4 =
  37. 37.26 × 4 =
  38. 38.33 × 8 =
  39. 39.27 × 4 =
  40. 40.60 × 4 =

Answer key

  1. 248
  2. 128
  3. 160
  4. 248
  5. 52
  6. 152
  7. 256
  8. 296
  9. 304
  10. 312
  11. 80
  12. 152
  13. 104
  14. 60
  15. 216
  16. 164
  17. 120
  18. 220
  19. 180
  20. 320
  21. 48
  22. 292
  23. 200
  24. 56
  25. 256
  26. 296
  27. 172
  28. 216
  29. 184
  30. 136
  31. 200
  32. 116
  33. 160
  34. 224
  35. 240
  36. 76
  37. 104
  38. 264
  39. 108
  40. 240

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