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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 498 · 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. 1.22 × 8 =
  2. 2.33 × 8 =
  3. 3.17 × 8 =
  4. 4.27 × 4 =
  5. 5.15 × 8 =
  6. 6.65 × 4 =
  7. 7.28 × 8 =
  8. 8.35 × 4 =
  9. 9.67 × 4 =
  10. 10.13 × 8 =
  11. 11.18 × 8 =
  12. 12.74 × 4 =
  13. 13.24 × 8 =
  14. 14.24 × 4 =
  15. 15.12 × 8 =
  16. 16.75 × 4 =
  17. 17.42 × 4 =
  18. 18.12 × 4 =
  19. 19.41 × 4 =
  20. 20.73 × 4 =
  21. 21.38 × 8 =
  22. 22.54 × 4 =
  23. 23.62 × 4 =
  24. 24.63 × 4 =
  25. 25.31 × 4 =
  26. 26.39 × 8 =
  27. 27.16 × 4 =
  28. 28.56 × 4 =
  29. 29.32 × 8 =
  30. 30.21 × 4 =
  31. 31.60 × 4 =
  32. 32.47 × 4 =
  33. 33.33 × 4 =
  34. 34.28 × 4 =
  35. 35.40 × 8 =
  36. 36.37 × 8 =
  37. 37.59 × 4 =
  38. 38.39 × 4 =
  39. 39.21 × 8 =
  40. 40.31 × 8 =

Answer key

  1. 176
  2. 264
  3. 136
  4. 108
  5. 120
  6. 260
  7. 224
  8. 140
  9. 268
  10. 104
  11. 144
  12. 296
  13. 192
  14. 96
  15. 96
  16. 300
  17. 168
  18. 48
  19. 164
  20. 292
  21. 304
  22. 216
  23. 248
  24. 252
  25. 124
  26. 312
  27. 64
  28. 224
  29. 256
  30. 84
  31. 240
  32. 188
  33. 132
  34. 112
  35. 320
  36. 296
  37. 236
  38. 156
  39. 168
  40. 248

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