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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 219 · 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 × 8 =
  2. 2.37 × 8 =
  3. 3.16 × 8 =
  4. 4.67 × 4 =
  5. 5.69 × 4 =
  6. 6.36 × 4 =
  7. 7.34 × 8 =
  8. 8.15 × 8 =
  9. 9.40 × 8 =
  10. 10.30 × 4 =
  11. 11.29 × 8 =
  12. 12.63 × 4 =
  13. 13.12 × 8 =
  14. 14.13 × 8 =
  15. 15.60 × 4 =
  16. 16.65 × 4 =
  17. 17.17 × 8 =
  18. 18.17 × 4 =
  19. 19.25 × 8 =
  20. 20.22 × 4 =
  21. 21.27 × 4 =
  22. 22.21 × 8 =
  23. 23.19 × 4 =
  24. 24.44 × 4 =
  25. 25.34 × 4 =
  26. 26.23 × 8 =
  27. 27.28 × 8 =
  28. 28.28 × 4 =
  29. 29.33 × 8 =
  30. 30.36 × 8 =
  31. 31.66 × 4 =
  32. 32.48 × 4 =
  33. 33.38 × 8 =
  34. 34.24 × 8 =
  35. 35.15 × 4 =
  36. 36.72 × 4 =
  37. 37.30 × 8 =
  38. 38.23 × 4 =
  39. 39.20 × 4 =
  40. 40.32 × 8 =

Answer key

  1. 144
  2. 296
  3. 128
  4. 268
  5. 276
  6. 144
  7. 272
  8. 120
  9. 320
  10. 120
  11. 232
  12. 252
  13. 96
  14. 104
  15. 240
  16. 260
  17. 136
  18. 68
  19. 200
  20. 88
  21. 108
  22. 168
  23. 76
  24. 176
  25. 136
  26. 184
  27. 224
  28. 112
  29. 264
  30. 288
  31. 264
  32. 192
  33. 304
  34. 192
  35. 60
  36. 288
  37. 240
  38. 92
  39. 80
  40. 256

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