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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 674 · 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 × 8 =
  2. 2.68 × 4 =
  3. 3.15 × 4 =
  4. 4.29 × 8 =
  5. 5.27 × 4 =
  6. 6.15 × 8 =
  7. 7.38 × 8 =
  8. 8.23 × 8 =
  9. 9.28 × 8 =
  10. 10.22 × 8 =
  11. 11.18 × 8 =
  12. 12.40 × 4 =
  13. 13.34 × 8 =
  14. 14.56 × 4 =
  15. 15.16 × 4 =
  16. 16.35 × 8 =
  17. 17.31 × 8 =
  18. 18.33 × 8 =
  19. 19.54 × 4 =
  20. 20.48 × 4 =
  21. 21.34 × 4 =
  22. 22.67 × 4 =
  23. 23.62 × 4 =
  24. 24.36 × 4 =
  25. 25.70 × 4 =
  26. 26.60 × 4 =
  27. 27.23 × 4 =
  28. 28.46 × 4 =
  29. 29.18 × 4 =
  30. 30.27 × 8 =
  31. 31.29 × 4 =
  32. 32.25 × 8 =
  33. 33.35 × 4 =
  34. 34.40 × 8 =
  35. 35.26 × 4 =
  36. 36.50 × 4 =
  37. 37.31 × 4 =
  38. 38.25 × 4 =
  39. 39.13 × 4 =
  40. 40.30 × 8 =

Answer key

  1. 152
  2. 272
  3. 60
  4. 232
  5. 108
  6. 120
  7. 304
  8. 184
  9. 224
  10. 176
  11. 144
  12. 160
  13. 272
  14. 224
  15. 64
  16. 280
  17. 248
  18. 264
  19. 216
  20. 192
  21. 136
  22. 268
  23. 248
  24. 144
  25. 280
  26. 240
  27. 92
  28. 184
  29. 72
  30. 216
  31. 116
  32. 200
  33. 140
  34. 320
  35. 104
  36. 200
  37. 124
  38. 100
  39. 52
  40. 240

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