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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 598 · 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. 1.68 × 4 =
  2. 2.22 × 4 =
  3. 3.34 × 8 =
  4. 4.46 × 4 =
  5. 5.14 × 4 =
  6. 6.33 × 4 =
  7. 7.22 × 8 =
  8. 8.15 × 8 =
  9. 9.17 × 8 =
  10. 10.27 × 4 =
  11. 11.23 × 8 =
  12. 12.16 × 8 =
  13. 13.30 × 8 =
  14. 14.37 × 8 =
  15. 15.20 × 4 =
  16. 16.20 × 8 =
  17. 17.39 × 4 =
  18. 18.50 × 4 =
  19. 19.29 × 8 =
  20. 20.18 × 8 =
  21. 21.54 × 4 =
  22. 22.15 × 4 =
  23. 23.49 × 4 =
  24. 24.59 × 4 =
  25. 25.35 × 8 =
  26. 26.16 × 4 =
  27. 27.39 × 8 =
  28. 28.32 × 4 =
  29. 29.18 × 4 =
  30. 30.62 × 4 =
  31. 31.75 × 4 =
  32. 32.12 × 4 =
  33. 33.25 × 8 =
  34. 34.74 × 4 =
  35. 35.30 × 4 =
  36. 36.70 × 4 =
  37. 37.32 × 8 =
  38. 38.13 × 4 =
  39. 39.71 × 4 =
  40. 40.41 × 4 =

Answer key

  1. 272
  2. 88
  3. 272
  4. 184
  5. 56
  6. 132
  7. 176
  8. 120
  9. 136
  10. 108
  11. 184
  12. 128
  13. 240
  14. 296
  15. 80
  16. 160
  17. 156
  18. 200
  19. 232
  20. 144
  21. 216
  22. 60
  23. 196
  24. 236
  25. 280
  26. 64
  27. 312
  28. 128
  29. 72
  30. 248
  31. 300
  32. 48
  33. 200
  34. 296
  35. 120
  36. 280
  37. 256
  38. 52
  39. 284
  40. 164

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