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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 583 · 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. 1.22 × 8 =
  2. 2.25 × 4 =
  3. 3.61 × 4 =
  4. 4.30 × 8 =
  5. 5.33 × 8 =
  6. 6.62 × 4 =
  7. 7.35 × 8 =
  8. 8.20 × 8 =
  9. 9.39 × 8 =
  10. 10.21 × 4 =
  11. 11.12 × 8 =
  12. 12.12 × 4 =
  13. 13.37 × 8 =
  14. 14.18 × 4 =
  15. 15.38 × 8 =
  16. 16.40 × 8 =
  17. 17.36 × 8 =
  18. 18.28 × 4 =
  19. 19.31 × 4 =
  20. 20.14 × 4 =
  21. 21.23 × 4 =
  22. 22.75 × 4 =
  23. 23.29 × 4 =
  24. 24.16 × 8 =
  25. 25.34 × 4 =
  26. 26.66 × 4 =
  27. 27.44 × 4 =
  28. 28.24 × 4 =
  29. 29.27 × 4 =
  30. 30.46 × 4 =
  31. 31.72 × 4 =
  32. 32.43 × 4 =
  33. 33.32 × 4 =
  34. 34.14 × 8 =
  35. 35.48 × 4 =
  36. 36.15 × 4 =
  37. 37.28 × 8 =
  38. 38.21 × 8 =
  39. 39.13 × 8 =
  40. 40.25 × 8 =

Answer key

  1. 176
  2. 100
  3. 244
  4. 240
  5. 264
  6. 248
  7. 280
  8. 160
  9. 312
  10. 84
  11. 96
  12. 48
  13. 296
  14. 72
  15. 304
  16. 320
  17. 288
  18. 112
  19. 124
  20. 56
  21. 92
  22. 300
  23. 116
  24. 128
  25. 136
  26. 264
  27. 176
  28. 96
  29. 108
  30. 184
  31. 288
  32. 172
  33. 128
  34. 112
  35. 192
  36. 60
  37. 224
  38. 168
  39. 104
  40. 200

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