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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 77 · 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. 1.19 × 4 =
  2. 2.13 × 8 =
  3. 3.20 × 4 =
  4. 4.12 × 4 =
  5. 5.17 × 4 =
  6. 6.27 × 8 =
  7. 7.15 × 8 =
  8. 8.22 × 8 =
  9. 9.17 × 8 =
  10. 10.74 × 4 =
  11. 11.14 × 8 =
  12. 12.16 × 8 =
  13. 13.18 × 8 =
  14. 14.21 × 8 =
  15. 15.66 × 4 =
  16. 16.24 × 8 =
  17. 17.45 × 4 =
  18. 18.31 × 4 =
  19. 19.21 × 4 =
  20. 20.36 × 4 =
  21. 21.50 × 4 =
  22. 22.34 × 8 =
  23. 23.62 × 4 =
  24. 24.36 × 8 =
  25. 25.68 × 4 =
  26. 26.38 × 8 =
  27. 27.15 × 4 =
  28. 28.40 × 8 =
  29. 29.23 × 8 =
  30. 30.30 × 4 =
  31. 31.33 × 8 =
  32. 32.29 × 4 =
  33. 33.60 × 4 =
  34. 34.12 × 8 =
  35. 35.16 × 4 =
  36. 36.33 × 4 =
  37. 37.70 × 4 =
  38. 38.59 × 4 =
  39. 39.38 × 4 =
  40. 40.27 × 4 =

Answer key

  1. 76
  2. 104
  3. 80
  4. 48
  5. 68
  6. 216
  7. 120
  8. 176
  9. 136
  10. 296
  11. 112
  12. 128
  13. 144
  14. 168
  15. 264
  16. 192
  17. 180
  18. 124
  19. 84
  20. 144
  21. 200
  22. 272
  23. 248
  24. 288
  25. 272
  26. 304
  27. 60
  28. 320
  29. 184
  30. 120
  31. 264
  32. 116
  33. 240
  34. 96
  35. 64
  36. 132
  37. 280
  38. 236
  39. 152
  40. 108

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