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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 11 · 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. 1.42 × 4 =
  2. 2.25 × 8 =
  3. 3.37 × 8 =
  4. 4.27 × 4 =
  5. 5.39 × 8 =
  6. 6.74 × 4 =
  7. 7.14 × 4 =
  8. 8.47 × 4 =
  9. 9.22 × 8 =
  10. 10.16 × 8 =
  11. 11.38 × 8 =
  12. 12.16 × 4 =
  13. 13.32 × 8 =
  14. 14.53 × 4 =
  15. 15.14 × 8 =
  16. 16.22 × 4 =
  17. 17.55 × 4 =
  18. 18.68 × 4 =
  19. 19.39 × 4 =
  20. 20.30 × 8 =
  21. 21.17 × 4 =
  22. 22.45 × 4 =
  23. 23.19 × 8 =
  24. 24.20 × 8 =
  25. 25.37 × 4 =
  26. 26.24 × 8 =
  27. 27.15 × 4 =
  28. 28.62 × 4 =
  29. 29.43 × 4 =
  30. 30.71 × 4 =
  31. 31.46 × 4 =
  32. 32.27 × 8 =
  33. 33.44 × 4 =
  34. 34.35 × 4 =
  35. 35.21 × 8 =
  36. 36.33 × 8 =
  37. 37.48 × 4 =
  38. 38.28 × 8 =
  39. 39.41 × 4 =
  40. 40.67 × 4 =

Answer key

  1. 168
  2. 200
  3. 296
  4. 108
  5. 312
  6. 296
  7. 56
  8. 188
  9. 176
  10. 128
  11. 304
  12. 64
  13. 256
  14. 212
  15. 112
  16. 88
  17. 220
  18. 272
  19. 156
  20. 240
  21. 68
  22. 180
  23. 152
  24. 160
  25. 148
  26. 192
  27. 60
  28. 248
  29. 172
  30. 284
  31. 184
  32. 216
  33. 176
  34. 140
  35. 168
  36. 264
  37. 192
  38. 224
  39. 164
  40. 268

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