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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 627 · 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. 1.19 × 4 =
  2. 2.28 × 4 =
  3. 3.12 × 8 =
  4. 4.45 × 4 =
  5. 5.40 × 8 =
  6. 6.27 × 8 =
  7. 7.58 × 4 =
  8. 8.13 × 8 =
  9. 9.17 × 8 =
  10. 10.20 × 4 =
  11. 11.31 × 4 =
  12. 12.14 × 4 =
  13. 13.20 × 8 =
  14. 14.68 × 4 =
  15. 15.30 × 8 =
  16. 16.14 × 8 =
  17. 17.33 × 8 =
  18. 18.31 × 8 =
  19. 19.18 × 8 =
  20. 20.34 × 8 =
  21. 21.49 × 4 =
  22. 22.29 × 4 =
  23. 23.25 × 4 =
  24. 24.52 × 4 =
  25. 25.13 × 4 =
  26. 26.15 × 4 =
  27. 27.23 × 8 =
  28. 28.15 × 8 =
  29. 29.27 × 4 =
  30. 30.62 × 4 =
  31. 31.35 × 8 =
  32. 32.23 × 4 =
  33. 33.32 × 8 =
  34. 34.25 × 8 =
  35. 35.19 × 8 =
  36. 36.47 × 4 =
  37. 37.21 × 8 =
  38. 38.43 × 4 =
  39. 39.16 × 8 =
  40. 40.73 × 4 =

Answer key

  1. 76
  2. 112
  3. 96
  4. 180
  5. 320
  6. 216
  7. 232
  8. 104
  9. 136
  10. 80
  11. 124
  12. 56
  13. 160
  14. 272
  15. 240
  16. 112
  17. 264
  18. 248
  19. 144
  20. 272
  21. 196
  22. 116
  23. 100
  24. 208
  25. 52
  26. 60
  27. 184
  28. 120
  29. 108
  30. 248
  31. 280
  32. 92
  33. 256
  34. 200
  35. 152
  36. 188
  37. 168
  38. 172
  39. 128
  40. 292

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