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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 562 · 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. 1.44 × 4 =
  2. 2.25 × 8 =
  3. 3.35 × 8 =
  4. 4.31 × 8 =
  5. 5.34 × 8 =
  6. 6.51 × 4 =
  7. 7.12 × 4 =
  8. 8.38 × 4 =
  9. 9.39 × 8 =
  10. 10.23 × 4 =
  11. 11.13 × 8 =
  12. 12.28 × 8 =
  13. 13.54 × 4 =
  14. 14.56 × 4 =
  15. 15.38 × 8 =
  16. 16.63 × 4 =
  17. 17.14 × 4 =
  18. 18.24 × 8 =
  19. 19.16 × 4 =
  20. 20.24 × 4 =
  21. 21.16 × 8 =
  22. 22.67 × 4 =
  23. 23.15 × 8 =
  24. 24.18 × 8 =
  25. 25.26 × 8 =
  26. 26.61 × 4 =
  27. 27.32 × 8 =
  28. 28.59 × 4 =
  29. 29.13 × 4 =
  30. 30.14 × 8 =
  31. 31.33 × 8 =
  32. 32.39 × 4 =
  33. 33.20 × 4 =
  34. 34.17 × 4 =
  35. 35.20 × 8 =
  36. 36.17 × 8 =
  37. 37.22 × 4 =
  38. 38.37 × 8 =
  39. 39.55 × 4 =
  40. 40.71 × 4 =

Answer key

  1. 176
  2. 200
  3. 280
  4. 248
  5. 272
  6. 204
  7. 48
  8. 152
  9. 312
  10. 92
  11. 104
  12. 224
  13. 216
  14. 224
  15. 304
  16. 252
  17. 56
  18. 192
  19. 64
  20. 96
  21. 128
  22. 268
  23. 120
  24. 144
  25. 208
  26. 244
  27. 256
  28. 236
  29. 52
  30. 112
  31. 264
  32. 156
  33. 80
  34. 68
  35. 160
  36. 136
  37. 88
  38. 296
  39. 220
  40. 284

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