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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 136 · 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. 1.63 × 4 =
  2. 2.60 × 4 =
  3. 3.36 × 8 =
  4. 4.74 × 4 =
  5. 5.27 × 8 =
  6. 6.18 × 4 =
  7. 7.16 × 4 =
  8. 8.28 × 8 =
  9. 9.29 × 4 =
  10. 10.28 × 4 =
  11. 11.18 × 8 =
  12. 12.48 × 4 =
  13. 13.40 × 4 =
  14. 14.32 × 4 =
  15. 15.16 × 8 =
  16. 16.70 × 4 =
  17. 17.69 × 4 =
  18. 18.31 × 8 =
  19. 19.50 × 4 =
  20. 20.19 × 8 =
  21. 21.15 × 4 =
  22. 22.49 × 4 =
  23. 23.26 × 8 =
  24. 24.30 × 4 =
  25. 25.14 × 8 =
  26. 26.33 × 8 =
  27. 27.13 × 4 =
  28. 28.73 × 4 =
  29. 29.39 × 4 =
  30. 30.35 × 4 =
  31. 31.34 × 4 =
  32. 32.55 × 4 =
  33. 33.64 × 4 =
  34. 34.15 × 8 =
  35. 35.37 × 8 =
  36. 36.56 × 4 =
  37. 37.58 × 4 =
  38. 38.40 × 8 =
  39. 39.19 × 4 =
  40. 40.17 × 8 =

Answer key

  1. 252
  2. 240
  3. 288
  4. 296
  5. 216
  6. 72
  7. 64
  8. 224
  9. 116
  10. 112
  11. 144
  12. 192
  13. 160
  14. 128
  15. 128
  16. 280
  17. 276
  18. 248
  19. 200
  20. 152
  21. 60
  22. 196
  23. 208
  24. 120
  25. 112
  26. 264
  27. 52
  28. 292
  29. 156
  30. 140
  31. 136
  32. 220
  33. 256
  34. 120
  35. 296
  36. 224
  37. 232
  38. 320
  39. 76
  40. 136

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