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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 247 · 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. 1.48 × 4 =
  2. 2.74 × 4 =
  3. 3.39 × 8 =
  4. 4.40 × 4 =
  5. 5.17 × 8 =
  6. 6.32 × 4 =
  7. 7.29 × 4 =
  8. 8.26 × 8 =
  9. 9.26 × 4 =
  10. 10.18 × 8 =
  11. 11.22 × 8 =
  12. 12.24 × 8 =
  13. 13.33 × 8 =
  14. 14.14 × 8 =
  15. 15.34 × 8 =
  16. 16.60 × 4 =
  17. 17.37 × 8 =
  18. 18.32 × 8 =
  19. 19.20 × 8 =
  20. 20.70 × 4 =
  21. 21.34 × 4 =
  22. 22.30 × 8 =
  23. 23.36 × 4 =
  24. 24.25 × 8 =
  25. 25.31 × 8 =
  26. 26.35 × 4 =
  27. 27.21 × 8 =
  28. 28.46 × 4 =
  29. 29.39 × 4 =
  30. 30.16 × 4 =
  31. 31.14 × 4 =
  32. 32.15 × 8 =
  33. 33.21 × 4 =
  34. 34.19 × 8 =
  35. 35.22 × 4 =
  36. 36.16 × 8 =
  37. 37.33 × 4 =
  38. 38.53 × 4 =
  39. 39.27 × 8 =
  40. 40.13 × 8 =

Answer key

  1. 192
  2. 296
  3. 312
  4. 160
  5. 136
  6. 128
  7. 116
  8. 208
  9. 104
  10. 144
  11. 176
  12. 192
  13. 264
  14. 112
  15. 272
  16. 240
  17. 296
  18. 256
  19. 160
  20. 280
  21. 136
  22. 240
  23. 144
  24. 200
  25. 248
  26. 140
  27. 168
  28. 184
  29. 156
  30. 64
  31. 56
  32. 120
  33. 84
  34. 152
  35. 88
  36. 128
  37. 132
  38. 212
  39. 216
  40. 104

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