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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 581 · 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. 1.23 × 8 =
  2. 2.16 × 4 =
  3. 3.20 × 8 =
  4. 4.29 × 8 =
  5. 5.16 × 8 =
  6. 6.52 × 4 =
  7. 7.24 × 4 =
  8. 8.60 × 4 =
  9. 9.30 × 4 =
  10. 10.15 × 8 =
  11. 11.70 × 4 =
  12. 12.50 × 4 =
  13. 13.74 × 4 =
  14. 14.21 × 8 =
  15. 15.33 × 4 =
  16. 16.73 × 4 =
  17. 17.30 × 8 =
  18. 18.67 × 4 =
  19. 19.23 × 4 =
  20. 20.17 × 8 =
  21. 21.26 × 8 =
  22. 22.27 × 8 =
  23. 23.26 × 4 =
  24. 24.64 × 4 =
  25. 25.22 × 8 =
  26. 26.32 × 4 =
  27. 27.19 × 8 =
  28. 28.39 × 8 =
  29. 29.15 × 4 =
  30. 30.68 × 4 =
  31. 31.37 × 8 =
  32. 32.63 × 4 =
  33. 33.56 × 4 =
  34. 34.12 × 4 =
  35. 35.38 × 8 =
  36. 36.34 × 4 =
  37. 37.35 × 8 =
  38. 38.19 × 4 =
  39. 39.29 × 4 =
  40. 40.32 × 8 =

Answer key

  1. 184
  2. 64
  3. 160
  4. 232
  5. 128
  6. 208
  7. 96
  8. 240
  9. 120
  10. 120
  11. 280
  12. 200
  13. 296
  14. 168
  15. 132
  16. 292
  17. 240
  18. 268
  19. 92
  20. 136
  21. 208
  22. 216
  23. 104
  24. 256
  25. 176
  26. 128
  27. 152
  28. 312
  29. 60
  30. 272
  31. 296
  32. 252
  33. 224
  34. 48
  35. 304
  36. 136
  37. 280
  38. 76
  39. 116
  40. 256

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