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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 391 · 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. 1.24 × 4 =
  2. 2.13 × 8 =
  3. 3.45 × 4 =
  4. 4.54 × 4 =
  5. 5.26 × 8 =
  6. 6.20 × 8 =
  7. 7.69 × 4 =
  8. 8.37 × 4 =
  9. 9.73 × 4 =
  10. 10.47 × 4 =
  11. 11.35 × 8 =
  12. 12.60 × 4 =
  13. 13.14 × 8 =
  14. 14.22 × 4 =
  15. 15.63 × 4 =
  16. 16.57 × 4 =
  17. 17.25 × 8 =
  18. 18.16 × 4 =
  19. 19.34 × 8 =
  20. 20.61 × 4 =
  21. 21.38 × 8 =
  22. 22.16 × 8 =
  23. 23.58 × 4 =
  24. 24.48 × 4 =
  25. 25.64 × 4 =
  26. 26.29 × 8 =
  27. 27.25 × 4 =
  28. 28.32 × 8 =
  29. 29.17 × 4 =
  30. 30.34 × 4 =
  31. 31.56 × 4 =
  32. 32.32 × 4 =
  33. 33.12 × 8 =
  34. 34.39 × 8 =
  35. 35.68 × 4 =
  36. 36.50 × 4 =
  37. 37.37 × 8 =
  38. 38.20 × 4 =
  39. 39.12 × 4 =
  40. 40.67 × 4 =

Answer key

  1. 96
  2. 104
  3. 180
  4. 216
  5. 208
  6. 160
  7. 276
  8. 148
  9. 292
  10. 188
  11. 280
  12. 240
  13. 112
  14. 88
  15. 252
  16. 228
  17. 200
  18. 64
  19. 272
  20. 244
  21. 304
  22. 128
  23. 232
  24. 192
  25. 256
  26. 232
  27. 100
  28. 256
  29. 68
  30. 136
  31. 224
  32. 128
  33. 96
  34. 312
  35. 272
  36. 200
  37. 296
  38. 80
  39. 48
  40. 268

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