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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 405 · 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. 1.59 × 4 =
  2. 2.20 × 4 =
  3. 3.35 × 4 =
  4. 4.35 × 8 =
  5. 5.18 × 8 =
  6. 6.52 × 4 =
  7. 7.40 × 8 =
  8. 8.55 × 4 =
  9. 9.25 × 8 =
  10. 10.29 × 8 =
  11. 11.20 × 8 =
  12. 12.34 × 4 =
  13. 13.30 × 4 =
  14. 14.33 × 4 =
  15. 15.17 × 8 =
  16. 16.61 × 4 =
  17. 17.28 × 4 =
  18. 18.32 × 4 =
  19. 19.27 × 4 =
  20. 20.60 × 4 =
  21. 21.54 × 4 =
  22. 22.17 × 4 =
  23. 23.34 × 8 =
  24. 24.19 × 8 =
  25. 25.16 × 8 =
  26. 26.44 × 4 =
  27. 27.26 × 8 =
  28. 28.23 × 8 =
  29. 29.36 × 8 =
  30. 30.47 × 4 =
  31. 31.31 × 8 =
  32. 32.15 × 8 =
  33. 33.28 × 8 =
  34. 34.27 × 8 =
  35. 35.21 × 8 =
  36. 36.21 × 4 =
  37. 37.15 × 4 =
  38. 38.38 × 4 =
  39. 39.13 × 8 =
  40. 40.31 × 4 =

Answer key

  1. 236
  2. 80
  3. 140
  4. 280
  5. 144
  6. 208
  7. 320
  8. 220
  9. 200
  10. 232
  11. 160
  12. 136
  13. 120
  14. 132
  15. 136
  16. 244
  17. 112
  18. 128
  19. 108
  20. 240
  21. 216
  22. 68
  23. 272
  24. 152
  25. 128
  26. 176
  27. 208
  28. 184
  29. 288
  30. 188
  31. 248
  32. 120
  33. 224
  34. 216
  35. 168
  36. 84
  37. 60
  38. 152
  39. 104
  40. 124

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