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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 698 · 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. 1.61 × 4 =
  2. 2.22 × 8 =
  3. 3.37 × 4 =
  4. 4.71 × 4 =
  5. 5.41 × 4 =
  6. 6.28 × 8 =
  7. 7.44 × 4 =
  8. 8.15 × 8 =
  9. 9.13 × 8 =
  10. 10.66 × 4 =
  11. 11.18 × 4 =
  12. 12.25 × 8 =
  13. 13.38 × 4 =
  14. 14.26 × 8 =
  15. 15.36 × 8 =
  16. 16.75 × 4 =
  17. 17.31 × 8 =
  18. 18.14 × 8 =
  19. 19.35 × 8 =
  20. 20.23 × 8 =
  21. 21.15 × 4 =
  22. 22.32 × 8 =
  23. 23.30 × 8 =
  24. 24.54 × 4 =
  25. 25.37 × 8 =
  26. 26.17 × 4 =
  27. 27.19 × 8 =
  28. 28.60 × 4 =
  29. 29.25 × 4 =
  30. 30.20 × 8 =
  31. 31.30 × 4 =
  32. 32.17 × 8 =
  33. 33.20 × 4 =
  34. 34.21 × 8 =
  35. 35.68 × 4 =
  36. 36.34 × 4 =
  37. 37.16 × 4 =
  38. 38.27 × 8 =
  39. 39.29 × 8 =
  40. 40.33 × 4 =

Answer key

  1. 244
  2. 176
  3. 148
  4. 284
  5. 164
  6. 224
  7. 176
  8. 120
  9. 104
  10. 264
  11. 72
  12. 200
  13. 152
  14. 208
  15. 288
  16. 300
  17. 248
  18. 112
  19. 280
  20. 184
  21. 60
  22. 256
  23. 240
  24. 216
  25. 296
  26. 68
  27. 152
  28. 240
  29. 100
  30. 160
  31. 120
  32. 136
  33. 80
  34. 168
  35. 272
  36. 136
  37. 64
  38. 216
  39. 232
  40. 132

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