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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 776 · 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. 1.24 × 4 =
  2. 2.71 × 4 =
  3. 3.66 × 4 =
  4. 4.21 × 8 =
  5. 5.23 × 4 =
  6. 6.26 × 8 =
  7. 7.33 × 8 =
  8. 8.30 × 4 =
  9. 9.27 × 8 =
  10. 10.74 × 4 =
  11. 11.39 × 4 =
  12. 12.31 × 8 =
  13. 13.47 × 4 =
  14. 14.30 × 8 =
  15. 15.26 × 4 =
  16. 16.15 × 8 =
  17. 17.17 × 4 =
  18. 18.29 × 8 =
  19. 19.36 × 8 =
  20. 20.35 × 8 =
  21. 21.12 × 4 =
  22. 22.75 × 4 =
  23. 23.25 × 8 =
  24. 24.55 × 4 =
  25. 25.72 × 4 =
  26. 26.58 × 4 =
  27. 27.34 × 4 =
  28. 28.20 × 4 =
  29. 29.17 × 8 =
  30. 30.25 × 4 =
  31. 31.19 × 8 =
  32. 32.13 × 8 =
  33. 33.32 × 8 =
  34. 34.60 × 4 =
  35. 35.59 × 4 =
  36. 36.39 × 8 =
  37. 37.62 × 4 =
  38. 38.61 × 4 =
  39. 39.20 × 8 =
  40. 40.73 × 4 =

Answer key

  1. 96
  2. 284
  3. 264
  4. 168
  5. 92
  6. 208
  7. 264
  8. 120
  9. 216
  10. 296
  11. 156
  12. 248
  13. 188
  14. 240
  15. 104
  16. 120
  17. 68
  18. 232
  19. 288
  20. 280
  21. 48
  22. 300
  23. 200
  24. 220
  25. 288
  26. 232
  27. 136
  28. 80
  29. 136
  30. 100
  31. 152
  32. 104
  33. 256
  34. 240
  35. 236
  36. 312
  37. 248
  38. 244
  39. 160
  40. 292

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