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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 240 · 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. 1.58 × 4 =
  2. 2.26 × 8 =
  3. 3.17 × 8 =
  4. 4.22 × 4 =
  5. 5.54 × 4 =
  6. 6.14 × 4 =
  7. 7.64 × 4 =
  8. 8.42 × 4 =
  9. 9.21 × 4 =
  10. 10.68 × 4 =
  11. 11.69 × 4 =
  12. 12.27 × 8 =
  13. 13.12 × 8 =
  14. 14.18 × 4 =
  15. 15.43 × 4 =
  16. 16.60 × 4 =
  17. 17.12 × 4 =
  18. 18.24 × 4 =
  19. 19.31 × 8 =
  20. 20.40 × 8 =
  21. 21.71 × 4 =
  22. 22.34 × 8 =
  23. 23.15 × 8 =
  24. 24.14 × 8 =
  25. 25.59 × 4 =
  26. 26.45 × 4 =
  27. 27.16 × 4 =
  28. 28.27 × 4 =
  29. 29.21 × 8 =
  30. 30.19 × 8 =
  31. 31.75 × 4 =
  32. 32.37 × 8 =
  33. 33.40 × 4 =
  34. 34.16 × 8 =
  35. 35.13 × 8 =
  36. 36.20 × 4 =
  37. 37.22 × 8 =
  38. 38.28 × 4 =
  39. 39.24 × 8 =
  40. 40.48 × 4 =

Answer key

  1. 232
  2. 208
  3. 136
  4. 88
  5. 216
  6. 56
  7. 256
  8. 168
  9. 84
  10. 272
  11. 276
  12. 216
  13. 96
  14. 72
  15. 172
  16. 240
  17. 48
  18. 96
  19. 248
  20. 320
  21. 284
  22. 272
  23. 120
  24. 112
  25. 236
  26. 180
  27. 64
  28. 108
  29. 168
  30. 152
  31. 300
  32. 296
  33. 160
  34. 128
  35. 104
  36. 80
  37. 176
  38. 112
  39. 192
  40. 192

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