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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 516 · 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. 1.55 × 4 =
  2. 2.34 × 4 =
  3. 3.26 × 8 =
  4. 4.26 × 4 =
  5. 5.28 × 4 =
  6. 6.61 × 4 =
  7. 7.62 × 4 =
  8. 8.23 × 4 =
  9. 9.14 × 8 =
  10. 10.15 × 8 =
  11. 11.21 × 4 =
  12. 12.17 × 8 =
  13. 13.20 × 4 =
  14. 14.35 × 8 =
  15. 15.15 × 4 =
  16. 16.29 × 8 =
  17. 17.22 × 8 =
  18. 18.75 × 4 =
  19. 19.12 × 8 =
  20. 20.40 × 8 =
  21. 21.64 × 4 =
  22. 22.53 × 4 =
  23. 23.12 × 4 =
  24. 24.37 × 8 =
  25. 25.72 × 4 =
  26. 26.52 × 4 =
  27. 27.42 × 4 =
  28. 28.60 × 4 =
  29. 29.21 × 8 =
  30. 30.36 × 4 =
  31. 31.49 × 4 =
  32. 32.33 × 8 =
  33. 33.18 × 4 =
  34. 34.32 × 4 =
  35. 35.18 × 8 =
  36. 36.13 × 4 =
  37. 37.20 × 8 =
  38. 38.67 × 4 =
  39. 39.39 × 8 =
  40. 40.17 × 4 =

Answer key

  1. 220
  2. 136
  3. 208
  4. 104
  5. 112
  6. 244
  7. 248
  8. 92
  9. 112
  10. 120
  11. 84
  12. 136
  13. 80
  14. 280
  15. 60
  16. 232
  17. 176
  18. 300
  19. 96
  20. 320
  21. 256
  22. 212
  23. 48
  24. 296
  25. 288
  26. 208
  27. 168
  28. 240
  29. 168
  30. 144
  31. 196
  32. 264
  33. 72
  34. 128
  35. 144
  36. 52
  37. 160
  38. 268
  39. 312
  40. 68

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