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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 616 · 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. 1.28 × 8 =
  2. 2.65 × 4 =
  3. 3.19 × 4 =
  4. 4.37 × 4 =
  5. 5.31 × 8 =
  6. 6.22 × 4 =
  7. 7.72 × 4 =
  8. 8.12 × 8 =
  9. 9.71 × 4 =
  10. 10.38 × 4 =
  11. 11.27 × 8 =
  12. 12.36 × 4 =
  13. 13.32 × 8 =
  14. 14.33 × 8 =
  15. 15.40 × 4 =
  16. 16.24 × 8 =
  17. 17.64 × 4 =
  18. 18.19 × 8 =
  19. 19.39 × 8 =
  20. 20.34 × 4 =
  21. 21.69 × 4 =
  22. 22.33 × 4 =
  23. 23.53 × 4 =
  24. 24.14 × 4 =
  25. 25.36 × 8 =
  26. 26.18 × 8 =
  27. 27.23 × 4 =
  28. 28.60 × 4 =
  29. 29.39 × 4 =
  30. 30.49 × 4 =
  31. 31.74 × 4 =
  32. 32.16 × 8 =
  33. 33.30 × 8 =
  34. 34.32 × 4 =
  35. 35.28 × 4 =
  36. 36.20 × 8 =
  37. 37.15 × 8 =
  38. 38.37 × 8 =
  39. 39.25 × 8 =
  40. 40.34 × 8 =

Answer key

  1. 224
  2. 260
  3. 76
  4. 148
  5. 248
  6. 88
  7. 288
  8. 96
  9. 284
  10. 152
  11. 216
  12. 144
  13. 256
  14. 264
  15. 160
  16. 192
  17. 256
  18. 152
  19. 312
  20. 136
  21. 276
  22. 132
  23. 212
  24. 56
  25. 288
  26. 144
  27. 92
  28. 240
  29. 156
  30. 196
  31. 296
  32. 128
  33. 240
  34. 128
  35. 112
  36. 160
  37. 120
  38. 296
  39. 200
  40. 272

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