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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 651 · 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. 1.58 × 4 =
  2. 2.73 × 4 =
  3. 3.13 × 8 =
  4. 4.62 × 4 =
  5. 5.16 × 4 =
  6. 6.40 × 8 =
  7. 7.61 × 4 =
  8. 8.26 × 4 =
  9. 9.19 × 8 =
  10. 10.66 × 4 =
  11. 11.39 × 8 =
  12. 12.30 × 4 =
  13. 13.38 × 8 =
  14. 14.23 × 4 =
  15. 15.16 × 8 =
  16. 16.42 × 4 =
  17. 17.28 × 8 =
  18. 18.31 × 8 =
  19. 19.32 × 8 =
  20. 20.75 × 4 =
  21. 21.12 × 4 =
  22. 22.17 × 4 =
  23. 23.18 × 8 =
  24. 24.27 × 8 =
  25. 25.33 × 8 =
  26. 26.26 × 8 =
  27. 27.29 × 4 =
  28. 28.37 × 8 =
  29. 29.15 × 8 =
  30. 30.28 × 4 =
  31. 31.38 × 4 =
  32. 32.39 × 4 =
  33. 33.36 × 4 =
  34. 34.20 × 8 =
  35. 35.27 × 4 =
  36. 36.36 × 8 =
  37. 37.67 × 4 =
  38. 38.25 × 8 =
  39. 39.50 × 4 =
  40. 40.53 × 4 =

Answer key

  1. 232
  2. 292
  3. 104
  4. 248
  5. 64
  6. 320
  7. 244
  8. 104
  9. 152
  10. 264
  11. 312
  12. 120
  13. 304
  14. 92
  15. 128
  16. 168
  17. 224
  18. 248
  19. 256
  20. 300
  21. 48
  22. 68
  23. 144
  24. 216
  25. 264
  26. 208
  27. 116
  28. 296
  29. 120
  30. 112
  31. 152
  32. 156
  33. 144
  34. 160
  35. 108
  36. 288
  37. 268
  38. 200
  39. 200
  40. 212

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