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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 217 · 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. 1.50 × 4 =
  2. 2.44 × 4 =
  3. 3.69 × 4 =
  4. 4.19 × 4 =
  5. 5.42 × 4 =
  6. 6.37 × 8 =
  7. 7.57 × 4 =
  8. 8.14 × 8 =
  9. 9.72 × 4 =
  10. 10.52 × 4 =
  11. 11.29 × 8 =
  12. 12.21 × 8 =
  13. 13.13 × 8 =
  14. 14.36 × 8 =
  15. 15.12 × 8 =
  16. 16.24 × 4 =
  17. 17.14 × 4 =
  18. 18.32 × 8 =
  19. 19.26 × 8 =
  20. 20.49 × 4 =
  21. 21.25 × 8 =
  22. 22.27 × 4 =
  23. 23.39 × 8 =
  24. 24.19 × 8 =
  25. 25.55 × 4 =
  26. 26.15 × 8 =
  27. 27.28 × 4 =
  28. 28.35 × 4 =
  29. 29.75 × 4 =
  30. 30.35 × 8 =
  31. 31.58 × 4 =
  32. 32.63 × 4 =
  33. 33.74 × 4 =
  34. 34.61 × 4 =
  35. 35.68 × 4 =
  36. 36.22 × 8 =
  37. 37.23 × 4 =
  38. 38.45 × 4 =
  39. 39.15 × 4 =
  40. 40.30 × 4 =

Answer key

  1. 200
  2. 176
  3. 276
  4. 76
  5. 168
  6. 296
  7. 228
  8. 112
  9. 288
  10. 208
  11. 232
  12. 168
  13. 104
  14. 288
  15. 96
  16. 96
  17. 56
  18. 256
  19. 208
  20. 196
  21. 200
  22. 108
  23. 312
  24. 152
  25. 220
  26. 120
  27. 112
  28. 140
  29. 300
  30. 280
  31. 232
  32. 252
  33. 296
  34. 244
  35. 272
  36. 176
  37. 92
  38. 180
  39. 60
  40. 120

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