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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 796 · 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. 1.24 × 8 =
  2. 2.31 × 8 =
  3. 3.33 × 4 =
  4. 4.40 × 4 =
  5. 5.36 × 4 =
  6. 6.41 × 4 =
  7. 7.39 × 8 =
  8. 8.17 × 8 =
  9. 9.65 × 4 =
  10. 10.14 × 8 =
  11. 11.26 × 4 =
  12. 12.26 × 8 =
  13. 13.30 × 8 =
  14. 14.15 × 8 =
  15. 15.51 × 4 =
  16. 16.27 × 8 =
  17. 17.34 × 4 =
  18. 18.18 × 8 =
  19. 19.59 × 4 =
  20. 20.60 × 4 =
  21. 21.58 × 4 =
  22. 22.14 × 4 =
  23. 23.34 × 8 =
  24. 24.37 × 8 =
  25. 25.20 × 4 =
  26. 26.56 × 4 =
  27. 27.23 × 8 =
  28. 28.16 × 8 =
  29. 29.70 × 4 =
  30. 30.62 × 4 =
  31. 31.12 × 8 =
  32. 32.18 × 4 =
  33. 33.55 × 4 =
  34. 34.19 × 8 =
  35. 35.48 × 4 =
  36. 36.49 × 4 =
  37. 37.27 × 4 =
  38. 38.35 × 4 =
  39. 39.45 × 4 =
  40. 40.25 × 4 =

Answer key

  1. 192
  2. 248
  3. 132
  4. 160
  5. 144
  6. 164
  7. 312
  8. 136
  9. 260
  10. 112
  11. 104
  12. 208
  13. 240
  14. 120
  15. 204
  16. 216
  17. 136
  18. 144
  19. 236
  20. 240
  21. 232
  22. 56
  23. 272
  24. 296
  25. 80
  26. 224
  27. 184
  28. 128
  29. 280
  30. 248
  31. 96
  32. 72
  33. 220
  34. 152
  35. 192
  36. 196
  37. 108
  38. 140
  39. 180
  40. 100

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