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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 118 · 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. 1.31 × 8 =
  2. 2.18 × 4 =
  3. 3.32 × 8 =
  4. 4.30 × 8 =
  5. 5.73 × 4 =
  6. 6.50 × 4 =
  7. 7.42 × 4 =
  8. 8.70 × 4 =
  9. 9.18 × 8 =
  10. 10.23 × 4 =
  11. 11.68 × 4 =
  12. 12.40 × 8 =
  13. 13.33 × 4 =
  14. 14.27 × 8 =
  15. 15.29 × 8 =
  16. 16.20 × 8 =
  17. 17.21 × 8 =
  18. 18.13 × 4 =
  19. 19.29 × 4 =
  20. 20.39 × 4 =
  21. 21.33 × 8 =
  22. 22.35 × 4 =
  23. 23.62 × 4 =
  24. 24.22 × 8 =
  25. 25.14 × 8 =
  26. 26.39 × 8 =
  27. 27.58 × 4 =
  28. 28.37 × 8 =
  29. 29.30 × 4 =
  30. 30.26 × 4 =
  31. 31.64 × 4 =
  32. 32.55 × 4 =
  33. 33.48 × 4 =
  34. 34.65 × 4 =
  35. 35.15 × 4 =
  36. 36.16 × 4 =
  37. 37.69 × 4 =
  38. 38.37 × 4 =
  39. 39.34 × 8 =
  40. 40.12 × 8 =

Answer key

  1. 248
  2. 72
  3. 256
  4. 240
  5. 292
  6. 200
  7. 168
  8. 280
  9. 144
  10. 92
  11. 272
  12. 320
  13. 132
  14. 216
  15. 232
  16. 160
  17. 168
  18. 52
  19. 116
  20. 156
  21. 264
  22. 140
  23. 248
  24. 176
  25. 112
  26. 312
  27. 232
  28. 296
  29. 120
  30. 104
  31. 256
  32. 220
  33. 192
  34. 260
  35. 60
  36. 64
  37. 276
  38. 148
  39. 272
  40. 96

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