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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 842 · 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. 1.63 × 4 =
  2. 2.19 × 8 =
  3. 3.30 × 8 =
  4. 4.23 × 4 =
  5. 5.33 × 4 =
  6. 6.60 × 4 =
  7. 7.15 × 8 =
  8. 8.42 × 4 =
  9. 9.14 × 4 =
  10. 10.30 × 4 =
  11. 11.37 × 8 =
  12. 12.71 × 4 =
  13. 13.18 × 4 =
  14. 14.17 × 8 =
  15. 15.16 × 8 =
  16. 16.23 × 8 =
  17. 17.28 × 4 =
  18. 18.41 × 4 =
  19. 19.69 × 4 =
  20. 20.54 × 4 =
  21. 21.24 × 8 =
  22. 22.38 × 8 =
  23. 23.34 × 8 =
  24. 24.25 × 4 =
  25. 25.13 × 8 =
  26. 26.21 × 4 =
  27. 27.40 × 8 =
  28. 28.66 × 4 =
  29. 29.43 × 4 =
  30. 30.26 × 8 =
  31. 31.31 × 8 =
  32. 32.16 × 4 =
  33. 33.18 × 8 =
  34. 34.39 × 4 =
  35. 35.73 × 4 =
  36. 36.46 × 4 =
  37. 37.28 × 8 =
  38. 38.32 × 4 =
  39. 39.56 × 4 =
  40. 40.35 × 4 =

Answer key

  1. 252
  2. 152
  3. 240
  4. 92
  5. 132
  6. 240
  7. 120
  8. 168
  9. 56
  10. 120
  11. 296
  12. 284
  13. 72
  14. 136
  15. 128
  16. 184
  17. 112
  18. 164
  19. 276
  20. 216
  21. 192
  22. 304
  23. 272
  24. 100
  25. 104
  26. 84
  27. 320
  28. 264
  29. 172
  30. 208
  31. 248
  32. 64
  33. 144
  34. 156
  35. 292
  36. 184
  37. 224
  38. 128
  39. 224
  40. 140

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