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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 307 · 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. 1.13 × 8 =
  2. 2.23 × 4 =
  3. 3.63 × 4 =
  4. 4.36 × 8 =
  5. 5.26 × 8 =
  6. 6.16 × 4 =
  7. 7.57 × 4 =
  8. 8.67 × 4 =
  9. 9.17 × 8 =
  10. 10.47 × 4 =
  11. 11.45 × 4 =
  12. 12.12 × 8 =
  13. 13.28 × 4 =
  14. 14.35 × 4 =
  15. 15.18 × 8 =
  16. 16.20 × 8 =
  17. 17.40 × 4 =
  18. 18.37 × 8 =
  19. 19.50 × 4 =
  20. 20.73 × 4 =
  21. 21.36 × 4 =
  22. 22.12 × 4 =
  23. 23.34 × 4 =
  24. 24.35 × 8 =
  25. 25.34 × 8 =
  26. 26.28 × 8 =
  27. 27.15 × 8 =
  28. 28.25 × 8 =
  29. 29.27 × 8 =
  30. 30.24 × 8 =
  31. 31.16 × 8 =
  32. 32.32 × 8 =
  33. 33.33 × 8 =
  34. 34.22 × 4 =
  35. 35.14 × 8 =
  36. 36.20 × 4 =
  37. 37.59 × 4 =
  38. 38.71 × 4 =
  39. 39.31 × 8 =
  40. 40.38 × 8 =

Answer key

  1. 104
  2. 92
  3. 252
  4. 288
  5. 208
  6. 64
  7. 228
  8. 268
  9. 136
  10. 188
  11. 180
  12. 96
  13. 112
  14. 140
  15. 144
  16. 160
  17. 160
  18. 296
  19. 200
  20. 292
  21. 144
  22. 48
  23. 136
  24. 280
  25. 272
  26. 224
  27. 120
  28. 200
  29. 216
  30. 192
  31. 128
  32. 256
  33. 264
  34. 88
  35. 112
  36. 80
  37. 236
  38. 284
  39. 248
  40. 304

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