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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 648 · 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. 1.14 × 4 =
  2. 2.16 × 4 =
  3. 3.23 × 4 =
  4. 4.13 × 4 =
  5. 5.13 × 8 =
  6. 6.19 × 4 =
  7. 7.53 × 4 =
  8. 8.71 × 4 =
  9. 9.60 × 4 =
  10. 10.64 × 4 =
  11. 11.35 × 4 =
  12. 12.41 × 4 =
  13. 13.72 × 4 =
  14. 14.65 × 4 =
  15. 15.38 × 4 =
  16. 16.63 × 4 =
  17. 17.20 × 4 =
  18. 18.34 × 8 =
  19. 19.73 × 4 =
  20. 20.19 × 8 =
  21. 21.18 × 8 =
  22. 22.56 × 4 =
  23. 23.33 × 4 =
  24. 24.15 × 8 =
  25. 25.26 × 8 =
  26. 26.20 × 8 =
  27. 27.30 × 4 =
  28. 28.15 × 4 =
  29. 29.26 × 4 =
  30. 30.30 × 8 =
  31. 31.40 × 8 =
  32. 32.74 × 4 =
  33. 33.35 × 8 =
  34. 34.29 × 8 =
  35. 35.24 × 8 =
  36. 36.31 × 8 =
  37. 37.29 × 4 =
  38. 38.32 × 8 =
  39. 39.28 × 4 =
  40. 40.75 × 4 =

Answer key

  1. 56
  2. 64
  3. 92
  4. 52
  5. 104
  6. 76
  7. 212
  8. 284
  9. 240
  10. 256
  11. 140
  12. 164
  13. 288
  14. 260
  15. 152
  16. 252
  17. 80
  18. 272
  19. 292
  20. 152
  21. 144
  22. 224
  23. 132
  24. 120
  25. 208
  26. 160
  27. 120
  28. 60
  29. 104
  30. 240
  31. 320
  32. 296
  33. 280
  34. 232
  35. 192
  36. 248
  37. 116
  38. 256
  39. 112
  40. 300

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