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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 528 · 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. 1.30 × 8 =
  2. 2.16 × 8 =
  3. 3.21 × 4 =
  4. 4.36 × 4 =
  5. 5.12 × 8 =
  6. 6.25 × 4 =
  7. 7.29 × 4 =
  8. 8.15 × 8 =
  9. 9.55 × 4 =
  10. 10.53 × 4 =
  11. 11.27 × 8 =
  12. 12.22 × 8 =
  13. 13.12 × 4 =
  14. 14.18 × 8 =
  15. 15.37 × 8 =
  16. 16.23 × 8 =
  17. 17.69 × 4 =
  18. 18.16 × 4 =
  19. 19.28 × 8 =
  20. 20.39 × 8 =
  21. 21.36 × 8 =
  22. 22.17 × 4 =
  23. 23.40 × 8 =
  24. 24.38 × 8 =
  25. 25.27 × 4 =
  26. 26.32 × 8 =
  27. 27.25 × 8 =
  28. 28.19 × 8 =
  29. 29.28 × 4 =
  30. 30.32 × 4 =
  31. 31.39 × 4 =
  32. 32.30 × 4 =
  33. 33.15 × 4 =
  34. 34.33 × 4 =
  35. 35.26 × 4 =
  36. 36.14 × 8 =
  37. 37.26 × 8 =
  38. 38.56 × 4 =
  39. 39.48 × 4 =
  40. 40.61 × 4 =

Answer key

  1. 240
  2. 128
  3. 84
  4. 144
  5. 96
  6. 100
  7. 116
  8. 120
  9. 220
  10. 212
  11. 216
  12. 176
  13. 48
  14. 144
  15. 296
  16. 184
  17. 276
  18. 64
  19. 224
  20. 312
  21. 288
  22. 68
  23. 320
  24. 304
  25. 108
  26. 256
  27. 200
  28. 152
  29. 112
  30. 128
  31. 156
  32. 120
  33. 60
  34. 132
  35. 104
  36. 112
  37. 208
  38. 224
  39. 192
  40. 244

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