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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 830 · 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. 1.19 × 8 =
  2. 2.61 × 4 =
  3. 3.16 × 8 =
  4. 4.40 × 4 =
  5. 5.17 × 4 =
  6. 6.36 × 4 =
  7. 7.17 × 8 =
  8. 8.66 × 4 =
  9. 9.30 × 8 =
  10. 10.34 × 8 =
  11. 11.15 × 4 =
  12. 12.67 × 4 =
  13. 13.73 × 4 =
  14. 14.22 × 8 =
  15. 15.55 × 4 =
  16. 16.22 × 4 =
  17. 17.28 × 4 =
  18. 18.30 × 4 =
  19. 19.70 × 4 =
  20. 20.65 × 4 =
  21. 21.46 × 4 =
  22. 22.27 × 8 =
  23. 23.38 × 4 =
  24. 24.33 × 8 =
  25. 25.13 × 8 =
  26. 26.38 × 8 =
  27. 27.23 × 4 =
  28. 28.24 × 8 =
  29. 29.68 × 4 =
  30. 30.31 × 8 =
  31. 31.16 × 4 =
  32. 32.53 × 4 =
  33. 33.23 × 8 =
  34. 34.12 × 8 =
  35. 35.50 × 4 =
  36. 36.29 × 8 =
  37. 37.18 × 8 =
  38. 38.19 × 4 =
  39. 39.39 × 8 =
  40. 40.52 × 4 =

Answer key

  1. 152
  2. 244
  3. 128
  4. 160
  5. 68
  6. 144
  7. 136
  8. 264
  9. 240
  10. 272
  11. 60
  12. 268
  13. 292
  14. 176
  15. 220
  16. 88
  17. 112
  18. 120
  19. 280
  20. 260
  21. 184
  22. 216
  23. 152
  24. 264
  25. 104
  26. 304
  27. 92
  28. 192
  29. 272
  30. 248
  31. 64
  32. 212
  33. 184
  34. 96
  35. 200
  36. 232
  37. 144
  38. 76
  39. 312
  40. 208

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