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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 660 · 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. 1.25 × 4 =
  2. 2.33 × 8 =
  3. 3.20 × 4 =
  4. 4.16 × 4 =
  5. 5.75 × 4 =
  6. 6.34 × 4 =
  7. 7.33 × 4 =
  8. 8.28 × 8 =
  9. 9.51 × 4 =
  10. 10.22 × 8 =
  11. 11.35 × 4 =
  12. 12.55 × 4 =
  13. 13.59 × 4 =
  14. 14.29 × 4 =
  15. 15.15 × 4 =
  16. 16.62 × 4 =
  17. 17.17 × 8 =
  18. 18.74 × 4 =
  19. 19.13 × 8 =
  20. 20.20 × 8 =
  21. 21.34 × 8 =
  22. 22.13 × 4 =
  23. 23.52 × 4 =
  24. 24.36 × 8 =
  25. 25.38 × 8 =
  26. 26.31 × 4 =
  27. 27.15 × 8 =
  28. 28.39 × 8 =
  29. 29.47 × 4 =
  30. 30.63 × 4 =
  31. 31.16 × 8 =
  32. 32.68 × 4 =
  33. 33.50 × 4 =
  34. 34.14 × 4 =
  35. 35.30 × 8 =
  36. 36.48 × 4 =
  37. 37.40 × 8 =
  38. 38.19 × 8 =
  39. 39.27 × 8 =
  40. 40.35 × 8 =

Answer key

  1. 100
  2. 264
  3. 80
  4. 64
  5. 300
  6. 136
  7. 132
  8. 224
  9. 204
  10. 176
  11. 140
  12. 220
  13. 236
  14. 116
  15. 60
  16. 248
  17. 136
  18. 296
  19. 104
  20. 160
  21. 272
  22. 52
  23. 208
  24. 288
  25. 304
  26. 124
  27. 120
  28. 312
  29. 188
  30. 252
  31. 128
  32. 272
  33. 200
  34. 56
  35. 240
  36. 192
  37. 320
  38. 152
  39. 216
  40. 280

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