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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 783 · 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. 2.17 × 8 =
  3. 3.40 × 8 =
  4. 4.29 × 8 =
  5. 5.67 × 4 =
  6. 6.19 × 8 =
  7. 7.65 × 4 =
  8. 8.46 × 4 =
  9. 9.54 × 4 =
  10. 10.41 × 4 =
  11. 11.16 × 4 =
  12. 12.61 × 4 =
  13. 13.74 × 4 =
  14. 14.24 × 8 =
  15. 15.16 × 8 =
  16. 16.35 × 8 =
  17. 17.25 × 8 =
  18. 18.32 × 8 =
  19. 19.70 × 4 =
  20. 20.66 × 4 =
  21. 21.12 × 8 =
  22. 22.22 × 8 =
  23. 23.53 × 4 =
  24. 24.35 × 4 =
  25. 25.26 × 8 =
  26. 26.39 × 4 =
  27. 27.14 × 4 =
  28. 28.15 × 4 =
  29. 29.24 × 4 =
  30. 30.39 × 8 =
  31. 31.34 × 4 =
  32. 32.23 × 8 =
  33. 33.30 × 4 =
  34. 34.68 × 4 =
  35. 35.40 × 4 =
  36. 36.20 × 8 =
  37. 37.32 × 4 =
  38. 38.75 × 4 =
  39. 39.30 × 8 =
  40. 40.27 × 8 =

Answer key

  1. 104
  2. 136
  3. 320
  4. 232
  5. 268
  6. 152
  7. 260
  8. 184
  9. 216
  10. 164
  11. 64
  12. 244
  13. 296
  14. 192
  15. 128
  16. 280
  17. 200
  18. 256
  19. 280
  20. 264
  21. 96
  22. 176
  23. 212
  24. 140
  25. 208
  26. 156
  27. 56
  28. 60
  29. 96
  30. 312
  31. 136
  32. 184
  33. 120
  34. 272
  35. 160
  36. 160
  37. 128
  38. 300
  39. 240
  40. 216

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