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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 795 · 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. 1.33 × 8 =
  2. 2.75 × 4 =
  3. 3.14 × 8 =
  4. 4.16 × 8 =
  5. 5.36 × 8 =
  6. 6.16 × 4 =
  7. 7.45 × 4 =
  8. 8.28 × 8 =
  9. 9.17 × 8 =
  10. 10.38 × 8 =
  11. 11.47 × 4 =
  12. 12.14 × 4 =
  13. 13.74 × 4 =
  14. 14.13 × 4 =
  15. 15.56 × 4 =
  16. 16.37 × 8 =
  17. 17.36 × 4 =
  18. 18.39 × 4 =
  19. 19.25 × 4 =
  20. 20.54 × 4 =
  21. 21.65 × 4 =
  22. 22.15 × 4 =
  23. 23.20 × 8 =
  24. 24.39 × 8 =
  25. 25.18 × 4 =
  26. 26.15 × 8 =
  27. 27.12 × 8 =
  28. 28.27 × 8 =
  29. 29.18 × 8 =
  30. 30.23 × 8 =
  31. 31.29 × 8 =
  32. 32.27 × 4 =
  33. 33.30 × 8 =
  34. 34.20 × 4 =
  35. 35.22 × 8 =
  36. 36.40 × 8 =
  37. 37.57 × 4 =
  38. 38.43 × 4 =
  39. 39.17 × 4 =
  40. 40.58 × 4 =

Answer key

  1. 264
  2. 300
  3. 112
  4. 128
  5. 288
  6. 64
  7. 180
  8. 224
  9. 136
  10. 304
  11. 188
  12. 56
  13. 296
  14. 52
  15. 224
  16. 296
  17. 144
  18. 156
  19. 100
  20. 216
  21. 260
  22. 60
  23. 160
  24. 312
  25. 72
  26. 120
  27. 96
  28. 216
  29. 144
  30. 184
  31. 232
  32. 108
  33. 240
  34. 80
  35. 176
  36. 320
  37. 228
  38. 172
  39. 68
  40. 232

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