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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 12 · 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. 1.25 × 4 =
  2. 2.29 × 4 =
  3. 3.31 × 8 =
  4. 4.61 × 4 =
  5. 5.20 × 8 =
  6. 6.34 × 8 =
  7. 7.18 × 8 =
  8. 8.13 × 4 =
  9. 9.74 × 4 =
  10. 10.12 × 4 =
  11. 11.60 × 4 =
  12. 12.73 × 4 =
  13. 13.21 × 8 =
  14. 14.13 × 8 =
  15. 15.45 × 4 =
  16. 16.30 × 4 =
  17. 17.49 × 4 =
  18. 18.46 × 4 =
  19. 19.68 × 4 =
  20. 20.15 × 4 =
  21. 21.17 × 4 =
  22. 22.37 × 8 =
  23. 23.27 × 8 =
  24. 24.28 × 4 =
  25. 25.16 × 8 =
  26. 26.19 × 8 =
  27. 27.36 × 8 =
  28. 28.54 × 4 =
  29. 29.66 × 4 =
  30. 30.15 × 8 =
  31. 31.12 × 8 =
  32. 32.36 × 4 =
  33. 33.47 × 4 =
  34. 34.18 × 4 =
  35. 35.35 × 8 =
  36. 36.33 × 8 =
  37. 37.16 × 4 =
  38. 38.44 × 4 =
  39. 39.30 × 8 =
  40. 40.25 × 8 =

Answer key

  1. 100
  2. 116
  3. 248
  4. 244
  5. 160
  6. 272
  7. 144
  8. 52
  9. 296
  10. 48
  11. 240
  12. 292
  13. 168
  14. 104
  15. 180
  16. 120
  17. 196
  18. 184
  19. 272
  20. 60
  21. 68
  22. 296
  23. 216
  24. 112
  25. 128
  26. 152
  27. 288
  28. 216
  29. 264
  30. 120
  31. 96
  32. 144
  33. 188
  34. 72
  35. 280
  36. 264
  37. 64
  38. 176
  39. 240
  40. 200

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