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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 463 · 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. 1.58 × 4 =
  2. 2.21 × 4 =
  3. 3.18 × 4 =
  4. 4.12 × 8 =
  5. 5.34 × 8 =
  6. 6.67 × 4 =
  7. 7.72 × 4 =
  8. 8.15 × 8 =
  9. 9.17 × 8 =
  10. 10.50 × 4 =
  11. 11.62 × 4 =
  12. 12.24 × 8 =
  13. 13.40 × 8 =
  14. 14.20 × 8 =
  15. 15.31 × 8 =
  16. 16.47 × 4 =
  17. 17.45 × 4 =
  18. 18.29 × 8 =
  19. 19.24 × 4 =
  20. 20.30 × 4 =
  21. 21.37 × 8 =
  22. 22.25 × 8 =
  23. 23.44 × 4 =
  24. 24.25 × 4 =
  25. 25.73 × 4 =
  26. 26.29 × 4 =
  27. 27.64 × 4 =
  28. 28.16 × 8 =
  29. 29.70 × 4 =
  30. 30.14 × 8 =
  31. 31.15 × 4 =
  32. 32.42 × 4 =
  33. 33.53 × 4 =
  34. 34.23 × 4 =
  35. 35.68 × 4 =
  36. 36.34 × 4 =
  37. 37.27 × 4 =
  38. 38.54 × 4 =
  39. 39.38 × 8 =
  40. 40.48 × 4 =

Answer key

  1. 232
  2. 84
  3. 72
  4. 96
  5. 272
  6. 268
  7. 288
  8. 120
  9. 136
  10. 200
  11. 248
  12. 192
  13. 320
  14. 160
  15. 248
  16. 188
  17. 180
  18. 232
  19. 96
  20. 120
  21. 296
  22. 200
  23. 176
  24. 100
  25. 292
  26. 116
  27. 256
  28. 128
  29. 280
  30. 112
  31. 60
  32. 168
  33. 212
  34. 92
  35. 272
  36. 136
  37. 108
  38. 216
  39. 304
  40. 192

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