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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 832 · 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. 1.26 × 8 =
  2. 2.22 × 4 =
  3. 3.40 × 4 =
  4. 4.29 × 8 =
  5. 5.18 × 8 =
  6. 6.30 × 8 =
  7. 7.35 × 8 =
  8. 8.38 × 8 =
  9. 9.17 × 4 =
  10. 10.62 × 4 =
  11. 11.25 × 8 =
  12. 12.27 × 4 =
  13. 13.14 × 8 =
  14. 14.65 × 4 =
  15. 15.53 × 4 =
  16. 16.63 × 4 =
  17. 17.31 × 8 =
  18. 18.70 × 4 =
  19. 19.16 × 4 =
  20. 20.71 × 4 =
  21. 21.19 × 4 =
  22. 22.67 × 4 =
  23. 23.73 × 4 =
  24. 24.37 × 8 =
  25. 25.34 × 4 =
  26. 26.74 × 4 =
  27. 27.75 × 4 =
  28. 28.25 × 4 =
  29. 29.24 × 4 =
  30. 30.56 × 4 =
  31. 31.27 × 8 =
  32. 32.12 × 8 =
  33. 33.35 × 4 =
  34. 34.55 × 4 =
  35. 35.18 × 4 =
  36. 36.12 × 4 =
  37. 37.33 × 8 =
  38. 38.23 × 4 =
  39. 39.52 × 4 =
  40. 40.17 × 8 =

Answer key

  1. 208
  2. 88
  3. 160
  4. 232
  5. 144
  6. 240
  7. 280
  8. 304
  9. 68
  10. 248
  11. 200
  12. 108
  13. 112
  14. 260
  15. 212
  16. 252
  17. 248
  18. 280
  19. 64
  20. 284
  21. 76
  22. 268
  23. 292
  24. 296
  25. 136
  26. 296
  27. 300
  28. 100
  29. 96
  30. 224
  31. 216
  32. 96
  33. 140
  34. 220
  35. 72
  36. 48
  37. 264
  38. 92
  39. 208
  40. 136

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