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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 858 · 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. 1.30 × 8 =
  2. 2.47 × 4 =
  3. 3.21 × 4 =
  4. 4.18 × 8 =
  5. 5.30 × 4 =
  6. 6.60 × 4 =
  7. 7.39 × 8 =
  8. 8.37 × 8 =
  9. 9.33 × 8 =
  10. 10.32 × 4 =
  11. 11.21 × 8 =
  12. 12.31 × 8 =
  13. 13.25 × 8 =
  14. 14.55 × 4 =
  15. 15.14 × 4 =
  16. 16.35 × 4 =
  17. 17.22 × 8 =
  18. 18.27 × 8 =
  19. 19.25 × 4 =
  20. 20.48 × 4 =
  21. 21.38 × 8 =
  22. 22.23 × 8 =
  23. 23.26 × 4 =
  24. 24.50 × 4 =
  25. 25.73 × 4 =
  26. 26.26 × 8 =
  27. 27.19 × 8 =
  28. 28.66 × 4 =
  29. 29.12 × 8 =
  30. 30.59 × 4 =
  31. 31.58 × 4 =
  32. 32.36 × 8 =
  33. 33.15 × 8 =
  34. 34.52 × 4 =
  35. 35.70 × 4 =
  36. 36.16 × 4 =
  37. 37.34 × 8 =
  38. 38.12 × 4 =
  39. 39.42 × 4 =
  40. 40.46 × 4 =

Answer key

  1. 240
  2. 188
  3. 84
  4. 144
  5. 120
  6. 240
  7. 312
  8. 296
  9. 264
  10. 128
  11. 168
  12. 248
  13. 200
  14. 220
  15. 56
  16. 140
  17. 176
  18. 216
  19. 100
  20. 192
  21. 304
  22. 184
  23. 104
  24. 200
  25. 292
  26. 208
  27. 152
  28. 264
  29. 96
  30. 236
  31. 232
  32. 288
  33. 120
  34. 208
  35. 280
  36. 64
  37. 272
  38. 48
  39. 168
  40. 184

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