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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 462 · 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. 1.39 × 4 =
  2. 2.65 × 4 =
  3. 3.34 × 8 =
  4. 4.12 × 8 =
  5. 5.35 × 8 =
  6. 6.25 × 8 =
  7. 7.24 × 4 =
  8. 8.54 × 4 =
  9. 9.21 × 8 =
  10. 10.28 × 8 =
  11. 11.60 × 4 =
  12. 12.27 × 4 =
  13. 13.14 × 8 =
  14. 14.71 × 4 =
  15. 15.21 × 4 =
  16. 16.30 × 8 =
  17. 17.18 × 8 =
  18. 18.37 × 8 =
  19. 19.16 × 4 =
  20. 20.30 × 4 =
  21. 21.19 × 8 =
  22. 22.31 × 8 =
  23. 23.26 × 4 =
  24. 24.23 × 4 =
  25. 25.24 × 8 =
  26. 26.23 × 8 =
  27. 27.38 × 4 =
  28. 28.29 × 8 =
  29. 29.20 × 8 =
  30. 30.12 × 4 =
  31. 31.19 × 4 =
  32. 32.35 × 4 =
  33. 33.38 × 8 =
  34. 34.34 × 4 =
  35. 35.44 × 4 =
  36. 36.37 × 4 =
  37. 37.22 × 8 =
  38. 38.14 × 4 =
  39. 39.33 × 8 =
  40. 40.18 × 4 =

Answer key

  1. 156
  2. 260
  3. 272
  4. 96
  5. 280
  6. 200
  7. 96
  8. 216
  9. 168
  10. 224
  11. 240
  12. 108
  13. 112
  14. 284
  15. 84
  16. 240
  17. 144
  18. 296
  19. 64
  20. 120
  21. 152
  22. 248
  23. 104
  24. 92
  25. 192
  26. 184
  27. 152
  28. 232
  29. 160
  30. 48
  31. 76
  32. 140
  33. 304
  34. 136
  35. 176
  36. 148
  37. 176
  38. 56
  39. 264
  40. 72

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