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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 517 · 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. 1.31 × 4 =
  2. 2.37 × 8 =
  3. 3.17 × 8 =
  4. 4.66 × 4 =
  5. 5.52 × 4 =
  6. 6.18 × 4 =
  7. 7.26 × 4 =
  8. 8.50 × 4 =
  9. 9.25 × 8 =
  10. 10.23 × 4 =
  11. 11.59 × 4 =
  12. 12.72 × 4 =
  13. 13.39 × 4 =
  14. 14.39 × 8 =
  15. 15.28 × 8 =
  16. 16.61 × 4 =
  17. 17.19 × 8 =
  18. 18.20 × 8 =
  19. 19.58 × 4 =
  20. 20.46 × 4 =
  21. 21.35 × 8 =
  22. 22.45 × 4 =
  23. 23.51 × 4 =
  24. 24.34 × 8 =
  25. 25.22 × 8 =
  26. 26.16 × 4 =
  27. 27.40 × 8 =
  28. 28.55 × 4 =
  29. 29.13 × 8 =
  30. 30.68 × 4 =
  31. 31.19 × 4 =
  32. 32.38 × 8 =
  33. 33.21 × 8 =
  34. 34.27 × 8 =
  35. 35.67 × 4 =
  36. 36.73 × 4 =
  37. 37.33 × 4 =
  38. 38.26 × 8 =
  39. 39.54 × 4 =
  40. 40.71 × 4 =

Answer key

  1. 124
  2. 296
  3. 136
  4. 264
  5. 208
  6. 72
  7. 104
  8. 200
  9. 200
  10. 92
  11. 236
  12. 288
  13. 156
  14. 312
  15. 224
  16. 244
  17. 152
  18. 160
  19. 232
  20. 184
  21. 280
  22. 180
  23. 204
  24. 272
  25. 176
  26. 64
  27. 320
  28. 220
  29. 104
  30. 272
  31. 76
  32. 304
  33. 168
  34. 216
  35. 268
  36. 292
  37. 132
  38. 208
  39. 216
  40. 284

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