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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 822 · 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. 1.26 × 4 =
  2. 2.36 × 8 =
  3. 3.16 × 8 =
  4. 4.17 × 8 =
  5. 5.74 × 4 =
  6. 6.34 × 4 =
  7. 7.21 × 8 =
  8. 8.36 × 4 =
  9. 9.31 × 8 =
  10. 10.58 × 4 =
  11. 11.28 × 4 =
  12. 12.60 × 4 =
  13. 13.12 × 8 =
  14. 14.24 × 8 =
  15. 15.73 × 4 =
  16. 16.22 × 8 =
  17. 17.25 × 8 =
  18. 18.33 × 8 =
  19. 19.20 × 4 =
  20. 20.61 × 4 =
  21. 21.64 × 4 =
  22. 22.13 × 8 =
  23. 23.43 × 4 =
  24. 24.39 × 8 =
  25. 25.40 × 8 =
  26. 26.22 × 4 =
  27. 27.19 × 8 =
  28. 28.18 × 4 =
  29. 29.18 × 8 =
  30. 30.50 × 4 =
  31. 31.38 × 8 =
  32. 32.29 × 8 =
  33. 33.29 × 4 =
  34. 34.62 × 4 =
  35. 35.30 × 8 =
  36. 36.37 × 8 =
  37. 37.68 × 4 =
  38. 38.57 × 4 =
  39. 39.34 × 8 =
  40. 40.20 × 8 =

Answer key

  1. 104
  2. 288
  3. 128
  4. 136
  5. 296
  6. 136
  7. 168
  8. 144
  9. 248
  10. 232
  11. 112
  12. 240
  13. 96
  14. 192
  15. 292
  16. 176
  17. 200
  18. 264
  19. 80
  20. 244
  21. 256
  22. 104
  23. 172
  24. 312
  25. 320
  26. 88
  27. 152
  28. 72
  29. 144
  30. 200
  31. 304
  32. 232
  33. 116
  34. 248
  35. 240
  36. 296
  37. 272
  38. 228
  39. 272
  40. 160

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