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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 944 · 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. 1.16 × 8 =
  2. 2.22 × 8 =
  3. 3.61 × 4 =
  4. 4.23 × 4 =
  5. 5.26 × 4 =
  6. 6.37 × 8 =
  7. 7.17 × 8 =
  8. 8.35 × 8 =
  9. 9.28 × 8 =
  10. 10.39 × 4 =
  11. 11.59 × 4 =
  12. 12.20 × 8 =
  13. 13.35 × 4 =
  14. 14.14 × 8 =
  15. 15.32 × 8 =
  16. 16.26 × 8 =
  17. 17.68 × 4 =
  18. 18.13 × 8 =
  19. 19.27 × 4 =
  20. 20.33 × 8 =
  21. 21.13 × 4 =
  22. 22.15 × 4 =
  23. 23.24 × 8 =
  24. 24.31 × 8 =
  25. 25.63 × 4 =
  26. 26.18 × 8 =
  27. 27.18 × 4 =
  28. 28.53 × 4 =
  29. 29.23 × 8 =
  30. 30.56 × 4 =
  31. 31.31 × 4 =
  32. 32.21 × 8 =
  33. 33.22 × 4 =
  34. 34.19 × 4 =
  35. 35.39 × 8 =
  36. 36.24 × 4 =
  37. 37.12 × 8 =
  38. 38.55 × 4 =
  39. 39.14 × 4 =
  40. 40.45 × 4 =

Answer key

  1. 128
  2. 176
  3. 244
  4. 92
  5. 104
  6. 296
  7. 136
  8. 280
  9. 224
  10. 156
  11. 236
  12. 160
  13. 140
  14. 112
  15. 256
  16. 208
  17. 272
  18. 104
  19. 108
  20. 264
  21. 52
  22. 60
  23. 192
  24. 248
  25. 252
  26. 144
  27. 72
  28. 212
  29. 184
  30. 224
  31. 124
  32. 168
  33. 88
  34. 76
  35. 312
  36. 96
  37. 96
  38. 220
  39. 56
  40. 180

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