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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 363 · 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. 1.33 × 8 =
  2. 2.13 × 8 =
  3. 3.18 × 4 =
  4. 4.72 × 4 =
  5. 5.69 × 4 =
  6. 6.19 × 8 =
  7. 7.75 × 4 =
  8. 8.14 × 8 =
  9. 9.30 × 8 =
  10. 10.28 × 4 =
  11. 11.59 × 4 =
  12. 12.24 × 8 =
  13. 13.39 × 8 =
  14. 14.23 × 4 =
  15. 15.73 × 4 =
  16. 16.45 × 4 =
  17. 17.18 × 8 =
  18. 18.37 × 4 =
  19. 19.25 × 4 =
  20. 20.21 × 4 =
  21. 21.15 × 8 =
  22. 22.26 × 4 =
  23. 23.34 × 8 =
  24. 24.27 × 8 =
  25. 25.17 × 8 =
  26. 26.60 × 4 =
  27. 27.37 × 8 =
  28. 28.36 × 8 =
  29. 29.19 × 4 =
  30. 30.32 × 4 =
  31. 31.41 × 4 =
  32. 32.55 × 4 =
  33. 33.40 × 8 =
  34. 34.71 × 4 =
  35. 35.16 × 8 =
  36. 36.40 × 4 =
  37. 37.35 × 4 =
  38. 38.36 × 4 =
  39. 39.39 × 4 =
  40. 40.35 × 8 =

Answer key

  1. 264
  2. 104
  3. 72
  4. 288
  5. 276
  6. 152
  7. 300
  8. 112
  9. 240
  10. 112
  11. 236
  12. 192
  13. 312
  14. 92
  15. 292
  16. 180
  17. 144
  18. 148
  19. 100
  20. 84
  21. 120
  22. 104
  23. 272
  24. 216
  25. 136
  26. 240
  27. 296
  28. 288
  29. 76
  30. 128
  31. 164
  32. 220
  33. 320
  34. 284
  35. 128
  36. 160
  37. 140
  38. 144
  39. 156
  40. 280

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