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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 173 · 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. 1.24 × 8 =
  2. 2.34 × 8 =
  3. 3.73 × 4 =
  4. 4.65 × 4 =
  5. 5.15 × 8 =
  6. 6.55 × 4 =
  7. 7.51 × 4 =
  8. 8.68 × 4 =
  9. 9.16 × 4 =
  10. 10.69 × 4 =
  11. 11.30 × 4 =
  12. 12.23 × 4 =
  13. 13.42 × 4 =
  14. 14.13 × 8 =
  15. 15.12 × 8 =
  16. 16.36 × 8 =
  17. 17.27 × 8 =
  18. 18.31 × 8 =
  19. 19.18 × 8 =
  20. 20.22 × 4 =
  21. 21.61 × 4 =
  22. 22.74 × 4 =
  23. 23.47 × 4 =
  24. 24.39 × 8 =
  25. 25.22 × 8 =
  26. 26.17 × 4 =
  27. 27.60 × 4 =
  28. 28.20 × 4 =
  29. 29.15 × 4 =
  30. 30.29 × 8 =
  31. 31.33 × 4 =
  32. 32.64 × 4 =
  33. 33.28 × 4 =
  34. 34.20 × 8 =
  35. 35.26 × 8 =
  36. 36.46 × 4 =
  37. 37.63 × 4 =
  38. 38.14 × 4 =
  39. 39.14 × 8 =
  40. 40.31 × 4 =

Answer key

  1. 192
  2. 272
  3. 292
  4. 260
  5. 120
  6. 220
  7. 204
  8. 272
  9. 64
  10. 276
  11. 120
  12. 92
  13. 168
  14. 104
  15. 96
  16. 288
  17. 216
  18. 248
  19. 144
  20. 88
  21. 244
  22. 296
  23. 188
  24. 312
  25. 176
  26. 68
  27. 240
  28. 80
  29. 60
  30. 232
  31. 132
  32. 256
  33. 112
  34. 160
  35. 208
  36. 184
  37. 252
  38. 56
  39. 112
  40. 124

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