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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 733 · 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. 1.17 × 8 =
  2. 2.16 × 8 =
  3. 3.20 × 8 =
  4. 4.37 × 4 =
  5. 5.29 × 4 =
  6. 6.30 × 4 =
  7. 7.31 × 8 =
  8. 8.75 × 4 =
  9. 9.23 × 4 =
  10. 10.19 × 8 =
  11. 11.20 × 4 =
  12. 12.32 × 4 =
  13. 13.15 × 8 =
  14. 14.14 × 4 =
  15. 15.13 × 8 =
  16. 16.27 × 4 =
  17. 17.14 × 8 =
  18. 18.33 × 8 =
  19. 19.35 × 8 =
  20. 20.22 × 8 =
  21. 21.42 × 4 =
  22. 22.28 × 4 =
  23. 23.52 × 4 =
  24. 24.51 × 4 =
  25. 25.21 × 4 =
  26. 26.34 × 8 =
  27. 27.28 × 8 =
  28. 28.66 × 4 =
  29. 29.49 × 4 =
  30. 30.56 × 4 =
  31. 31.30 × 8 =
  32. 32.65 × 4 =
  33. 33.25 × 8 =
  34. 34.26 × 4 =
  35. 35.13 × 4 =
  36. 36.39 × 8 =
  37. 37.36 × 8 =
  38. 38.63 × 4 =
  39. 39.38 × 8 =
  40. 40.74 × 4 =

Answer key

  1. 136
  2. 128
  3. 160
  4. 148
  5. 116
  6. 120
  7. 248
  8. 300
  9. 92
  10. 152
  11. 80
  12. 128
  13. 120
  14. 56
  15. 104
  16. 108
  17. 112
  18. 264
  19. 280
  20. 176
  21. 168
  22. 112
  23. 208
  24. 204
  25. 84
  26. 272
  27. 224
  28. 264
  29. 196
  30. 224
  31. 240
  32. 260
  33. 200
  34. 104
  35. 52
  36. 312
  37. 288
  38. 252
  39. 304
  40. 296

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