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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 209 · 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. 1.73 × 4 =
  2. 2.23 × 8 =
  3. 3.59 × 4 =
  4. 4.27 × 8 =
  5. 5.49 × 4 =
  6. 6.22 × 4 =
  7. 7.18 × 8 =
  8. 8.15 × 8 =
  9. 9.27 × 4 =
  10. 10.20 × 4 =
  11. 11.29 × 8 =
  12. 12.40 × 8 =
  13. 13.21 × 8 =
  14. 14.20 × 8 =
  15. 15.19 × 4 =
  16. 16.34 × 4 =
  17. 17.46 × 4 =
  18. 18.25 × 8 =
  19. 19.53 × 4 =
  20. 20.54 × 4 =
  21. 21.13 × 8 =
  22. 22.70 × 4 =
  23. 23.19 × 8 =
  24. 24.35 × 8 =
  25. 25.34 × 8 =
  26. 26.38 × 4 =
  27. 27.12 × 4 =
  28. 28.28 × 8 =
  29. 29.17 × 8 =
  30. 30.66 × 4 =
  31. 31.13 × 4 =
  32. 32.35 × 4 =
  33. 33.26 × 4 =
  34. 34.28 × 4 =
  35. 35.23 × 4 =
  36. 36.58 × 4 =
  37. 37.30 × 8 =
  38. 38.62 × 4 =
  39. 39.65 × 4 =
  40. 40.52 × 4 =

Answer key

  1. 292
  2. 184
  3. 236
  4. 216
  5. 196
  6. 88
  7. 144
  8. 120
  9. 108
  10. 80
  11. 232
  12. 320
  13. 168
  14. 160
  15. 76
  16. 136
  17. 184
  18. 200
  19. 212
  20. 216
  21. 104
  22. 280
  23. 152
  24. 280
  25. 272
  26. 152
  27. 48
  28. 224
  29. 136
  30. 264
  31. 52
  32. 140
  33. 104
  34. 112
  35. 92
  36. 232
  37. 240
  38. 248
  39. 260
  40. 208

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