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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 255 · 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. 1.18 × 4 =
  2. 2.34 × 8 =
  3. 3.13 × 8 =
  4. 4.73 × 4 =
  5. 5.20 × 8 =
  6. 6.54 × 4 =
  7. 7.62 × 4 =
  8. 8.23 × 8 =
  9. 9.55 × 4 =
  10. 10.26 × 8 =
  11. 11.30 × 4 =
  12. 12.44 × 4 =
  13. 13.43 × 4 =
  14. 14.49 × 4 =
  15. 15.58 × 4 =
  16. 16.14 × 4 =
  17. 17.75 × 4 =
  18. 18.27 × 8 =
  19. 19.25 × 8 =
  20. 20.12 × 8 =
  21. 21.20 × 4 =
  22. 22.63 × 4 =
  23. 23.36 × 4 =
  24. 24.19 × 4 =
  25. 25.17 × 4 =
  26. 26.15 × 8 =
  27. 27.45 × 4 =
  28. 28.28 × 8 =
  29. 29.60 × 4 =
  30. 30.39 × 8 =
  31. 31.16 × 4 =
  32. 32.36 × 8 =
  33. 33.29 × 8 =
  34. 34.41 × 4 =
  35. 35.15 × 4 =
  36. 36.28 × 4 =
  37. 37.74 × 4 =
  38. 38.66 × 4 =
  39. 39.56 × 4 =
  40. 40.18 × 8 =

Answer key

  1. 72
  2. 272
  3. 104
  4. 292
  5. 160
  6. 216
  7. 248
  8. 184
  9. 220
  10. 208
  11. 120
  12. 176
  13. 172
  14. 196
  15. 232
  16. 56
  17. 300
  18. 216
  19. 200
  20. 96
  21. 80
  22. 252
  23. 144
  24. 76
  25. 68
  26. 120
  27. 180
  28. 224
  29. 240
  30. 312
  31. 64
  32. 288
  33. 232
  34. 164
  35. 60
  36. 112
  37. 296
  38. 264
  39. 224
  40. 144

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