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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 715 · 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. 1.29 × 8 =
  2. 2.25 × 8 =
  3. 3.47 × 4 =
  4. 4.27 × 8 =
  5. 5.37 × 4 =
  6. 6.12 × 8 =
  7. 7.26 × 8 =
  8. 8.45 × 4 =
  9. 9.54 × 4 =
  10. 10.38 × 4 =
  11. 11.21 × 4 =
  12. 12.29 × 4 =
  13. 13.15 × 8 =
  14. 14.14 × 8 =
  15. 15.37 × 8 =
  16. 16.63 × 4 =
  17. 17.34 × 4 =
  18. 18.18 × 8 =
  19. 19.32 × 8 =
  20. 20.46 × 4 =
  21. 21.53 × 4 =
  22. 22.32 × 4 =
  23. 23.27 × 4 =
  24. 24.35 × 8 =
  25. 25.61 × 4 =
  26. 26.69 × 4 =
  27. 27.19 × 8 =
  28. 28.60 × 4 =
  29. 29.20 × 8 =
  30. 30.16 × 8 =
  31. 31.38 × 8 =
  32. 32.23 × 4 =
  33. 33.31 × 4 =
  34. 34.68 × 4 =
  35. 35.23 × 8 =
  36. 36.35 × 4 =
  37. 37.30 × 8 =
  38. 38.74 × 4 =
  39. 39.22 × 8 =
  40. 40.28 × 8 =

Answer key

  1. 232
  2. 200
  3. 188
  4. 216
  5. 148
  6. 96
  7. 208
  8. 180
  9. 216
  10. 152
  11. 84
  12. 116
  13. 120
  14. 112
  15. 296
  16. 252
  17. 136
  18. 144
  19. 256
  20. 184
  21. 212
  22. 128
  23. 108
  24. 280
  25. 244
  26. 276
  27. 152
  28. 240
  29. 160
  30. 128
  31. 304
  32. 92
  33. 124
  34. 272
  35. 184
  36. 140
  37. 240
  38. 296
  39. 176
  40. 224

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