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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 67 · 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. 1.72 × 4 =
  2. 2.52 × 4 =
  3. 3.20 × 8 =
  4. 4.13 × 8 =
  5. 5.14 × 4 =
  6. 6.35 × 4 =
  7. 7.31 × 8 =
  8. 8.12 × 8 =
  9. 9.24 × 8 =
  10. 10.16 × 8 =
  11. 11.35 × 8 =
  12. 12.30 × 8 =
  13. 13.34 × 8 =
  14. 14.37 × 8 =
  15. 15.69 × 4 =
  16. 16.19 × 8 =
  17. 17.27 × 8 =
  18. 18.32 × 8 =
  19. 19.48 × 4 =
  20. 20.17 × 4 =
  21. 21.23 × 8 =
  22. 22.21 × 8 =
  23. 23.62 × 4 =
  24. 24.30 × 4 =
  25. 25.71 × 4 =
  26. 26.55 × 4 =
  27. 27.19 × 4 =
  28. 28.15 × 8 =
  29. 29.17 × 8 =
  30. 30.43 × 4 =
  31. 31.45 × 4 =
  32. 32.25 × 4 =
  33. 33.44 × 4 =
  34. 34.21 × 4 =
  35. 35.13 × 4 =
  36. 36.42 × 4 =
  37. 37.61 × 4 =
  38. 38.40 × 8 =
  39. 39.33 × 8 =
  40. 40.49 × 4 =

Answer key

  1. 288
  2. 208
  3. 160
  4. 104
  5. 56
  6. 140
  7. 248
  8. 96
  9. 192
  10. 128
  11. 280
  12. 240
  13. 272
  14. 296
  15. 276
  16. 152
  17. 216
  18. 256
  19. 192
  20. 68
  21. 184
  22. 168
  23. 248
  24. 120
  25. 284
  26. 220
  27. 76
  28. 120
  29. 136
  30. 172
  31. 180
  32. 100
  33. 176
  34. 84
  35. 52
  36. 168
  37. 244
  38. 320
  39. 264
  40. 196

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