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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 317 · 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 × 8 =
  2. 2.71 × 4 =
  3. 3.26 × 8 =
  4. 4.61 × 4 =
  5. 5.39 × 4 =
  6. 6.34 × 8 =
  7. 7.52 × 4 =
  8. 8.25 × 8 =
  9. 9.30 × 4 =
  10. 10.18 × 4 =
  11. 11.73 × 4 =
  12. 12.60 × 4 =
  13. 13.56 × 4 =
  14. 14.20 × 4 =
  15. 15.15 × 8 =
  16. 16.24 × 8 =
  17. 17.35 × 8 =
  18. 18.28 × 8 =
  19. 19.53 × 4 =
  20. 20.12 × 8 =
  21. 21.14 × 4 =
  22. 22.17 × 4 =
  23. 23.50 × 4 =
  24. 24.29 × 8 =
  25. 25.57 × 4 =
  26. 26.75 × 4 =
  27. 27.29 × 4 =
  28. 28.42 × 4 =
  29. 29.41 × 4 =
  30. 30.16 × 8 =
  31. 31.38 × 8 =
  32. 32.33 × 4 =
  33. 33.14 × 8 =
  34. 34.48 × 4 =
  35. 35.33 × 8 =
  36. 36.65 × 4 =
  37. 37.36 × 8 =
  38. 38.25 × 4 =
  39. 39.13 × 4 =
  40. 40.43 × 4 =

Answer key

  1. 152
  2. 284
  3. 208
  4. 244
  5. 156
  6. 272
  7. 208
  8. 200
  9. 120
  10. 72
  11. 292
  12. 240
  13. 224
  14. 80
  15. 120
  16. 192
  17. 280
  18. 224
  19. 212
  20. 96
  21. 56
  22. 68
  23. 200
  24. 232
  25. 228
  26. 300
  27. 116
  28. 168
  29. 164
  30. 128
  31. 304
  32. 132
  33. 112
  34. 192
  35. 264
  36. 260
  37. 288
  38. 100
  39. 52
  40. 172

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