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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 968 · 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. 1.35 × 8 =
  2. 2.12 × 8 =
  3. 3.67 × 4 =
  4. 4.55 × 4 =
  5. 5.20 × 8 =
  6. 6.73 × 4 =
  7. 7.22 × 8 =
  8. 8.25 × 8 =
  9. 9.18 × 4 =
  10. 10.19 × 4 =
  11. 11.61 × 4 =
  12. 12.49 × 4 =
  13. 13.27 × 4 =
  14. 14.13 × 8 =
  15. 15.14 × 8 =
  16. 16.42 × 4 =
  17. 17.75 × 4 =
  18. 18.64 × 4 =
  19. 19.59 × 4 =
  20. 20.20 × 4 =
  21. 21.21 × 4 =
  22. 22.17 × 8 =
  23. 23.30 × 4 =
  24. 24.57 × 4 =
  25. 25.27 × 8 =
  26. 26.23 × 4 =
  27. 27.16 × 8 =
  28. 28.23 × 8 =
  29. 29.34 × 8 =
  30. 30.26 × 4 =
  31. 31.51 × 4 =
  32. 32.44 × 4 =
  33. 33.74 × 4 =
  34. 34.43 × 4 =
  35. 35.35 × 4 =
  36. 36.37 × 8 =
  37. 37.60 × 4 =
  38. 38.39 × 4 =
  39. 39.29 × 8 =
  40. 40.47 × 4 =

Answer key

  1. 280
  2. 96
  3. 268
  4. 220
  5. 160
  6. 292
  7. 176
  8. 200
  9. 72
  10. 76
  11. 244
  12. 196
  13. 108
  14. 104
  15. 112
  16. 168
  17. 300
  18. 256
  19. 236
  20. 80
  21. 84
  22. 136
  23. 120
  24. 228
  25. 216
  26. 92
  27. 128
  28. 184
  29. 272
  30. 104
  31. 204
  32. 176
  33. 296
  34. 172
  35. 140
  36. 296
  37. 240
  38. 156
  39. 232
  40. 188

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