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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 497 · 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. 1.12 × 8 =
  2. 2.25 × 8 =
  3. 3.46 × 4 =
  4. 4.33 × 8 =
  5. 5.29 × 8 =
  6. 6.30 × 4 =
  7. 7.31 × 4 =
  8. 8.74 × 4 =
  9. 9.15 × 4 =
  10. 10.14 × 4 =
  11. 11.26 × 4 =
  12. 12.72 × 4 =
  13. 13.23 × 4 =
  14. 14.75 × 4 =
  15. 15.19 × 8 =
  16. 16.68 × 4 =
  17. 17.35 × 8 =
  18. 18.36 × 8 =
  19. 19.35 × 4 =
  20. 20.37 × 8 =
  21. 21.28 × 4 =
  22. 22.47 × 4 =
  23. 23.31 × 8 =
  24. 24.52 × 4 =
  25. 25.37 × 4 =
  26. 26.71 × 4 =
  27. 27.13 × 8 =
  28. 28.30 × 8 =
  29. 29.59 × 4 =
  30. 30.21 × 4 =
  31. 31.60 × 4 =
  32. 32.18 × 4 =
  33. 33.34 × 8 =
  34. 34.21 × 8 =
  35. 35.65 × 4 =
  36. 36.34 × 4 =
  37. 37.26 × 8 =
  38. 38.32 × 8 =
  39. 39.66 × 4 =
  40. 40.17 × 8 =

Answer key

  1. 96
  2. 200
  3. 184
  4. 264
  5. 232
  6. 120
  7. 124
  8. 296
  9. 60
  10. 56
  11. 104
  12. 288
  13. 92
  14. 300
  15. 152
  16. 272
  17. 280
  18. 288
  19. 140
  20. 296
  21. 112
  22. 188
  23. 248
  24. 208
  25. 148
  26. 284
  27. 104
  28. 240
  29. 236
  30. 84
  31. 240
  32. 72
  33. 272
  34. 168
  35. 260
  36. 136
  37. 208
  38. 256
  39. 264
  40. 136

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