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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 617 · 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. 1.24 × 8 =
  2. 2.19 × 8 =
  3. 3.67 × 4 =
  4. 4.74 × 4 =
  5. 5.38 × 8 =
  6. 6.33 × 8 =
  7. 7.70 × 4 =
  8. 8.27 × 4 =
  9. 9.18 × 8 =
  10. 10.22 × 8 =
  11. 11.21 × 4 =
  12. 12.28 × 4 =
  13. 13.17 × 8 =
  14. 14.32 × 8 =
  15. 15.50 × 4 =
  16. 16.12 × 8 =
  17. 17.36 × 8 =
  18. 18.13 × 8 =
  19. 19.45 × 4 =
  20. 20.21 × 8 =
  21. 21.43 × 4 =
  22. 22.23 × 8 =
  23. 23.15 × 4 =
  24. 24.16 × 8 =
  25. 25.14 × 8 =
  26. 26.36 × 4 =
  27. 27.23 × 4 =
  28. 28.68 × 4 =
  29. 29.39 × 4 =
  30. 30.69 × 4 =
  31. 31.35 × 8 =
  32. 32.31 × 8 =
  33. 33.37 × 4 =
  34. 34.75 × 4 =
  35. 35.47 × 4 =
  36. 36.72 × 4 =
  37. 37.15 × 8 =
  38. 38.62 × 4 =
  39. 39.28 × 8 =
  40. 40.35 × 4 =

Answer key

  1. 192
  2. 152
  3. 268
  4. 296
  5. 304
  6. 264
  7. 280
  8. 108
  9. 144
  10. 176
  11. 84
  12. 112
  13. 136
  14. 256
  15. 200
  16. 96
  17. 288
  18. 104
  19. 180
  20. 168
  21. 172
  22. 184
  23. 60
  24. 128
  25. 112
  26. 144
  27. 92
  28. 272
  29. 156
  30. 276
  31. 280
  32. 248
  33. 148
  34. 300
  35. 188
  36. 288
  37. 120
  38. 248
  39. 224
  40. 140

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