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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 144 · 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. 1.12 × 4 =
  2. 2.19 × 4 =
  3. 3.38 × 8 =
  4. 4.16 × 4 =
  5. 5.42 × 4 =
  6. 6.37 × 8 =
  7. 7.74 × 4 =
  8. 8.62 × 4 =
  9. 9.50 × 4 =
  10. 10.39 × 8 =
  11. 11.17 × 8 =
  12. 12.18 × 4 =
  13. 13.36 × 4 =
  14. 14.40 × 8 =
  15. 15.25 × 8 =
  16. 16.28 × 8 =
  17. 17.43 × 4 =
  18. 18.35 × 4 =
  19. 19.16 × 8 =
  20. 20.29 × 4 =
  21. 21.13 × 4 =
  22. 22.68 × 4 =
  23. 23.29 × 8 =
  24. 24.63 × 4 =
  25. 25.15 × 8 =
  26. 26.34 × 8 =
  27. 27.14 × 8 =
  28. 28.30 × 8 =
  29. 29.27 × 8 =
  30. 30.58 × 4 =
  31. 31.19 × 8 =
  32. 32.45 × 4 =
  33. 33.75 × 4 =
  34. 34.14 × 4 =
  35. 35.31 × 8 =
  36. 36.21 × 8 =
  37. 37.15 × 4 =
  38. 38.70 × 4 =
  39. 39.54 × 4 =
  40. 40.18 × 8 =

Answer key

  1. 48
  2. 76
  3. 304
  4. 64
  5. 168
  6. 296
  7. 296
  8. 248
  9. 200
  10. 312
  11. 136
  12. 72
  13. 144
  14. 320
  15. 200
  16. 224
  17. 172
  18. 140
  19. 128
  20. 116
  21. 52
  22. 272
  23. 232
  24. 252
  25. 120
  26. 272
  27. 112
  28. 240
  29. 216
  30. 232
  31. 152
  32. 180
  33. 300
  34. 56
  35. 248
  36. 168
  37. 60
  38. 280
  39. 216
  40. 144

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