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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 384 · 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. 1.65 × 4 =
  2. 2.17 × 8 =
  3. 3.28 × 8 =
  4. 4.45 × 4 =
  5. 5.19 × 4 =
  6. 6.29 × 8 =
  7. 7.30 × 8 =
  8. 8.26 × 4 =
  9. 9.27 × 4 =
  10. 10.33 × 8 =
  11. 11.35 × 8 =
  12. 12.34 × 8 =
  13. 13.24 × 4 =
  14. 14.68 × 4 =
  15. 15.36 × 8 =
  16. 16.60 × 4 =
  17. 17.16 × 4 =
  18. 18.22 × 8 =
  19. 19.13 × 4 =
  20. 20.14 × 8 =
  21. 21.38 × 4 =
  22. 22.17 × 4 =
  23. 23.53 × 4 =
  24. 24.31 × 8 =
  25. 25.15 × 8 =
  26. 26.59 × 4 =
  27. 27.22 × 4 =
  28. 28.52 × 4 =
  29. 29.26 × 8 =
  30. 30.24 × 8 =
  31. 31.23 × 8 =
  32. 32.57 × 4 =
  33. 33.15 × 4 =
  34. 34.74 × 4 =
  35. 35.14 × 4 =
  36. 36.32 × 8 =
  37. 37.12 × 8 =
  38. 38.73 × 4 =
  39. 39.38 × 8 =
  40. 40.40 × 8 =

Answer key

  1. 260
  2. 136
  3. 224
  4. 180
  5. 76
  6. 232
  7. 240
  8. 104
  9. 108
  10. 264
  11. 280
  12. 272
  13. 96
  14. 272
  15. 288
  16. 240
  17. 64
  18. 176
  19. 52
  20. 112
  21. 152
  22. 68
  23. 212
  24. 248
  25. 120
  26. 236
  27. 88
  28. 208
  29. 208
  30. 192
  31. 184
  32. 228
  33. 60
  34. 296
  35. 56
  36. 256
  37. 96
  38. 292
  39. 304
  40. 320

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