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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 599 · 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. 1.27 × 8 =
  2. 2.24 × 8 =
  3. 3.15 × 4 =
  4. 4.34 × 8 =
  5. 5.75 × 4 =
  6. 6.23 × 4 =
  7. 7.38 × 8 =
  8. 8.73 × 4 =
  9. 9.29 × 4 =
  10. 10.13 × 4 =
  11. 11.14 × 4 =
  12. 12.51 × 4 =
  13. 13.19 × 8 =
  14. 14.21 × 8 =
  15. 15.38 × 4 =
  16. 16.18 × 4 =
  17. 17.34 × 4 =
  18. 18.31 × 4 =
  19. 19.28 × 4 =
  20. 20.65 × 4 =
  21. 21.40 × 8 =
  22. 22.12 × 4 =
  23. 23.26 × 8 =
  24. 24.67 × 4 =
  25. 25.17 × 8 =
  26. 26.31 × 8 =
  27. 27.36 × 8 =
  28. 28.33 × 8 =
  29. 29.21 × 4 =
  30. 30.18 × 8 =
  31. 31.13 × 8 =
  32. 32.55 × 4 =
  33. 33.44 × 4 =
  34. 34.57 × 4 =
  35. 35.15 × 8 =
  36. 36.63 × 4 =
  37. 37.68 × 4 =
  38. 38.20 × 4 =
  39. 39.39 × 4 =
  40. 40.62 × 4 =

Answer key

  1. 216
  2. 192
  3. 60
  4. 272
  5. 300
  6. 92
  7. 304
  8. 292
  9. 116
  10. 52
  11. 56
  12. 204
  13. 152
  14. 168
  15. 152
  16. 72
  17. 136
  18. 124
  19. 112
  20. 260
  21. 320
  22. 48
  23. 208
  24. 268
  25. 136
  26. 248
  27. 288
  28. 264
  29. 84
  30. 144
  31. 104
  32. 220
  33. 176
  34. 228
  35. 120
  36. 252
  37. 272
  38. 80
  39. 156
  40. 248

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