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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 262 · 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. 1.68 × 4 =
  2. 2.63 × 4 =
  3. 3.53 × 4 =
  4. 4.52 × 4 =
  5. 5.17 × 4 =
  6. 6.24 × 8 =
  7. 7.35 × 4 =
  8. 8.27 × 4 =
  9. 9.16 × 8 =
  10. 10.34 × 4 =
  11. 11.33 × 8 =
  12. 12.13 × 4 =
  13. 13.29 × 4 =
  14. 14.31 × 8 =
  15. 15.17 × 8 =
  16. 16.30 × 8 =
  17. 17.39 × 4 =
  18. 18.34 × 8 =
  19. 19.38 × 8 =
  20. 20.37 × 4 =
  21. 21.67 × 4 =
  22. 22.20 × 8 =
  23. 23.40 × 8 =
  24. 24.19 × 8 =
  25. 25.12 × 8 =
  26. 26.15 × 8 =
  27. 27.35 × 8 =
  28. 28.62 × 4 =
  29. 29.73 × 4 =
  30. 30.22 × 8 =
  31. 31.21 × 4 =
  32. 32.36 × 8 =
  33. 33.26 × 4 =
  34. 34.16 × 4 =
  35. 35.42 × 4 =
  36. 36.61 × 4 =
  37. 37.20 × 4 =
  38. 38.30 × 4 =
  39. 39.12 × 4 =
  40. 40.57 × 4 =

Answer key

  1. 272
  2. 252
  3. 212
  4. 208
  5. 68
  6. 192
  7. 140
  8. 108
  9. 128
  10. 136
  11. 264
  12. 52
  13. 116
  14. 248
  15. 136
  16. 240
  17. 156
  18. 272
  19. 304
  20. 148
  21. 268
  22. 160
  23. 320
  24. 152
  25. 96
  26. 120
  27. 280
  28. 248
  29. 292
  30. 176
  31. 84
  32. 288
  33. 104
  34. 64
  35. 168
  36. 244
  37. 80
  38. 120
  39. 48
  40. 228

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