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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 480 · 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. 1.13 × 8 =
  2. 2.34 × 8 =
  3. 3.30 × 4 =
  4. 4.27 × 4 =
  5. 5.37 × 4 =
  6. 6.25 × 8 =
  7. 7.32 × 8 =
  8. 8.72 × 4 =
  9. 9.24 × 8 =
  10. 10.75 × 4 =
  11. 11.20 × 4 =
  12. 12.15 × 8 =
  13. 13.69 × 4 =
  14. 14.13 × 4 =
  15. 15.12 × 8 =
  16. 16.59 × 4 =
  17. 17.29 × 8 =
  18. 18.60 × 4 =
  19. 19.58 × 4 =
  20. 20.16 × 8 =
  21. 21.68 × 4 =
  22. 22.46 × 4 =
  23. 23.21 × 4 =
  24. 24.27 × 8 =
  25. 25.28 × 8 =
  26. 26.24 × 4 =
  27. 27.33 × 4 =
  28. 28.49 × 4 =
  29. 29.25 × 4 =
  30. 30.22 × 4 =
  31. 31.17 × 4 =
  32. 32.56 × 4 =
  33. 33.22 × 8 =
  34. 34.19 × 8 =
  35. 35.39 × 8 =
  36. 36.62 × 4 =
  37. 37.36 × 8 =
  38. 38.33 × 8 =
  39. 39.63 × 4 =
  40. 40.37 × 8 =

Answer key

  1. 104
  2. 272
  3. 120
  4. 108
  5. 148
  6. 200
  7. 256
  8. 288
  9. 192
  10. 300
  11. 80
  12. 120
  13. 276
  14. 52
  15. 96
  16. 236
  17. 232
  18. 240
  19. 232
  20. 128
  21. 272
  22. 184
  23. 84
  24. 216
  25. 224
  26. 96
  27. 132
  28. 196
  29. 100
  30. 88
  31. 68
  32. 224
  33. 176
  34. 152
  35. 312
  36. 248
  37. 288
  38. 264
  39. 252
  40. 296

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