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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 424 · 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. 1.38 × 4 =
  2. 2.22 × 8 =
  3. 3.25 × 4 =
  4. 4.57 × 4 =
  5. 5.21 × 4 =
  6. 6.23 × 8 =
  7. 7.13 × 8 =
  8. 8.75 × 4 =
  9. 9.27 × 8 =
  10. 10.20 × 8 =
  11. 11.19 × 4 =
  12. 12.35 × 8 =
  13. 13.22 × 4 =
  14. 14.26 × 8 =
  15. 15.14 × 8 =
  16. 16.34 × 8 =
  17. 17.16 × 8 =
  18. 18.39 × 4 =
  19. 19.33 × 8 =
  20. 20.71 × 4 =
  21. 21.28 × 8 =
  22. 22.19 × 8 =
  23. 23.31 × 4 =
  24. 24.17 × 8 =
  25. 25.48 × 4 =
  26. 26.27 × 4 =
  27. 27.37 × 8 =
  28. 28.35 × 4 =
  29. 29.60 × 4 =
  30. 30.64 × 4 =
  31. 31.29 × 8 =
  32. 32.12 × 8 =
  33. 33.32 × 4 =
  34. 34.40 × 8 =
  35. 35.54 × 4 =
  36. 36.68 × 4 =
  37. 37.36 × 8 =
  38. 38.17 × 4 =
  39. 39.52 × 4 =
  40. 40.15 × 4 =

Answer key

  1. 152
  2. 176
  3. 100
  4. 228
  5. 84
  6. 184
  7. 104
  8. 300
  9. 216
  10. 160
  11. 76
  12. 280
  13. 88
  14. 208
  15. 112
  16. 272
  17. 128
  18. 156
  19. 264
  20. 284
  21. 224
  22. 152
  23. 124
  24. 136
  25. 192
  26. 108
  27. 296
  28. 140
  29. 240
  30. 256
  31. 232
  32. 96
  33. 128
  34. 320
  35. 216
  36. 272
  37. 288
  38. 68
  39. 208
  40. 60

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