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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 758 · 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. 1.26 × 8 =
  2. 2.17 × 8 =
  3. 3.13 × 8 =
  4. 4.40 × 4 =
  5. 5.38 × 4 =
  6. 6.15 × 8 =
  7. 7.18 × 4 =
  8. 8.30 × 8 =
  9. 9.26 × 4 =
  10. 10.60 × 4 =
  11. 11.46 × 4 =
  12. 12.57 × 4 =
  13. 13.39 × 8 =
  14. 14.29 × 8 =
  15. 15.75 × 4 =
  16. 16.27 × 8 =
  17. 17.32 × 8 =
  18. 18.34 × 8 =
  19. 19.31 × 4 =
  20. 20.66 × 4 =
  21. 21.18 × 8 =
  22. 22.38 × 8 =
  23. 23.19 × 8 =
  24. 24.34 × 4 =
  25. 25.13 × 4 =
  26. 26.23 × 8 =
  27. 27.14 × 8 =
  28. 28.30 × 4 =
  29. 29.27 × 4 =
  30. 30.25 × 8 =
  31. 31.53 × 4 =
  32. 32.64 × 4 =
  33. 33.61 × 4 =
  34. 34.49 × 4 =
  35. 35.19 × 4 =
  36. 36.65 × 4 =
  37. 37.36 × 8 =
  38. 38.12 × 8 =
  39. 39.21 × 8 =
  40. 40.12 × 4 =

Answer key

  1. 208
  2. 136
  3. 104
  4. 160
  5. 152
  6. 120
  7. 72
  8. 240
  9. 104
  10. 240
  11. 184
  12. 228
  13. 312
  14. 232
  15. 300
  16. 216
  17. 256
  18. 272
  19. 124
  20. 264
  21. 144
  22. 304
  23. 152
  24. 136
  25. 52
  26. 184
  27. 112
  28. 120
  29. 108
  30. 200
  31. 212
  32. 256
  33. 244
  34. 196
  35. 76
  36. 260
  37. 288
  38. 96
  39. 168
  40. 48

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