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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 863 · 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. 1.67 × 4 =
  2. 2.14 × 8 =
  3. 3.52 × 4 =
  4. 4.61 × 4 =
  5. 5.33 × 8 =
  6. 6.59 × 4 =
  7. 7.25 × 8 =
  8. 8.74 × 4 =
  9. 9.13 × 4 =
  10. 10.27 × 4 =
  11. 11.34 × 8 =
  12. 12.13 × 8 =
  13. 13.15 × 4 =
  14. 14.12 × 8 =
  15. 15.66 × 4 =
  16. 16.46 × 4 =
  17. 17.62 × 4 =
  18. 18.70 × 4 =
  19. 19.26 × 8 =
  20. 20.47 × 4 =
  21. 21.54 × 4 =
  22. 22.39 × 4 =
  23. 23.58 × 4 =
  24. 24.23 × 8 =
  25. 25.53 × 4 =
  26. 26.16 × 8 =
  27. 27.20 × 8 =
  28. 28.27 × 8 =
  29. 29.30 × 8 =
  30. 30.49 × 4 =
  31. 31.29 × 8 =
  32. 32.26 × 4 =
  33. 33.17 × 4 =
  34. 34.28 × 8 =
  35. 35.48 × 4 =
  36. 36.55 × 4 =
  37. 37.16 × 4 =
  38. 38.30 × 4 =
  39. 39.39 × 8 =
  40. 40.19 × 4 =

Answer key

  1. 268
  2. 112
  3. 208
  4. 244
  5. 264
  6. 236
  7. 200
  8. 296
  9. 52
  10. 108
  11. 272
  12. 104
  13. 60
  14. 96
  15. 264
  16. 184
  17. 248
  18. 280
  19. 208
  20. 188
  21. 216
  22. 156
  23. 232
  24. 184
  25. 212
  26. 128
  27. 160
  28. 216
  29. 240
  30. 196
  31. 232
  32. 104
  33. 68
  34. 224
  35. 192
  36. 220
  37. 64
  38. 120
  39. 312
  40. 76

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