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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 226 · 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. 1.59 × 4 =
  2. 2.31 × 8 =
  3. 3.17 × 4 =
  4. 4.33 × 4 =
  5. 5.31 × 4 =
  6. 6.75 × 4 =
  7. 7.14 × 8 =
  8. 8.30 × 4 =
  9. 9.33 × 8 =
  10. 10.36 × 4 =
  11. 11.22 × 4 =
  12. 12.21 × 8 =
  13. 13.26 × 4 =
  14. 14.39 × 8 =
  15. 15.38 × 4 =
  16. 16.19 × 4 =
  17. 17.13 × 8 =
  18. 18.40 × 8 =
  19. 19.39 × 4 =
  20. 20.64 × 4 =
  21. 21.70 × 4 =
  22. 22.24 × 4 =
  23. 23.55 × 4 =
  24. 24.12 × 8 =
  25. 25.28 × 8 =
  26. 26.30 × 8 =
  27. 27.18 × 4 =
  28. 28.32 × 8 =
  29. 29.23 × 4 =
  30. 30.22 × 8 =
  31. 31.35 × 8 =
  32. 32.15 × 8 =
  33. 33.68 × 4 =
  34. 34.20 × 8 =
  35. 35.23 × 8 =
  36. 36.52 × 4 =
  37. 37.49 × 4 =
  38. 38.12 × 4 =
  39. 39.60 × 4 =
  40. 40.25 × 8 =

Answer key

  1. 236
  2. 248
  3. 68
  4. 132
  5. 124
  6. 300
  7. 112
  8. 120
  9. 264
  10. 144
  11. 88
  12. 168
  13. 104
  14. 312
  15. 152
  16. 76
  17. 104
  18. 320
  19. 156
  20. 256
  21. 280
  22. 96
  23. 220
  24. 96
  25. 224
  26. 240
  27. 72
  28. 256
  29. 92
  30. 176
  31. 280
  32. 120
  33. 272
  34. 160
  35. 184
  36. 208
  37. 196
  38. 48
  39. 240
  40. 200

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