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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 151 · 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. 1.37 × 8 =
  2. 2.33 × 4 =
  3. 3.45 × 4 =
  4. 4.15 × 8 =
  5. 5.36 × 4 =
  6. 6.12 × 8 =
  7. 7.19 × 8 =
  8. 8.38 × 8 =
  9. 9.36 × 8 =
  10. 10.18 × 8 =
  11. 11.64 × 4 =
  12. 12.17 × 4 =
  13. 13.30 × 4 =
  14. 14.69 × 4 =
  15. 15.13 × 4 =
  16. 16.63 × 4 =
  17. 17.28 × 4 =
  18. 18.35 × 4 =
  19. 19.34 × 8 =
  20. 20.30 × 8 =
  21. 21.22 × 8 =
  22. 22.31 × 8 =
  23. 23.75 × 4 =
  24. 24.35 × 8 =
  25. 25.24 × 8 =
  26. 26.20 × 8 =
  27. 27.23 × 4 =
  28. 28.17 × 8 =
  29. 29.39 × 8 =
  30. 30.16 × 8 =
  31. 31.50 × 4 =
  32. 32.25 × 4 =
  33. 33.27 × 8 =
  34. 34.48 × 4 =
  35. 35.68 × 4 =
  36. 36.21 × 4 =
  37. 37.33 × 8 =
  38. 38.39 × 4 =
  39. 39.25 × 8 =
  40. 40.22 × 4 =

Answer key

  1. 296
  2. 132
  3. 180
  4. 120
  5. 144
  6. 96
  7. 152
  8. 304
  9. 288
  10. 144
  11. 256
  12. 68
  13. 120
  14. 276
  15. 52
  16. 252
  17. 112
  18. 140
  19. 272
  20. 240
  21. 176
  22. 248
  23. 300
  24. 280
  25. 192
  26. 160
  27. 92
  28. 136
  29. 312
  30. 128
  31. 200
  32. 100
  33. 216
  34. 192
  35. 272
  36. 84
  37. 264
  38. 156
  39. 200
  40. 88

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