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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 941 · 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. 1.27 × 4 =
  2. 2.47 × 4 =
  3. 3.19 × 4 =
  4. 4.64 × 4 =
  5. 5.38 × 8 =
  6. 6.25 × 8 =
  7. 7.43 × 4 =
  8. 8.29 × 8 =
  9. 9.34 × 4 =
  10. 10.73 × 4 =
  11. 11.29 × 4 =
  12. 12.39 × 8 =
  13. 13.57 × 4 =
  14. 14.14 × 8 =
  15. 15.24 × 8 =
  16. 16.74 × 4 =
  17. 17.15 × 8 =
  18. 18.32 × 4 =
  19. 19.51 × 4 =
  20. 20.13 × 8 =
  21. 21.23 × 8 =
  22. 22.68 × 4 =
  23. 23.25 × 4 =
  24. 24.28 × 8 =
  25. 25.16 × 8 =
  26. 26.22 × 4 =
  27. 27.22 × 8 =
  28. 28.42 × 4 =
  29. 29.40 × 8 =
  30. 30.48 × 4 =
  31. 31.19 × 8 =
  32. 32.33 × 8 =
  33. 33.37 × 8 =
  34. 34.27 × 8 =
  35. 35.18 × 8 =
  36. 36.20 × 4 =
  37. 37.32 × 8 =
  38. 38.20 × 8 =
  39. 39.21 × 8 =
  40. 40.55 × 4 =

Answer key

  1. 108
  2. 188
  3. 76
  4. 256
  5. 304
  6. 200
  7. 172
  8. 232
  9. 136
  10. 292
  11. 116
  12. 312
  13. 228
  14. 112
  15. 192
  16. 296
  17. 120
  18. 128
  19. 204
  20. 104
  21. 184
  22. 272
  23. 100
  24. 224
  25. 128
  26. 88
  27. 176
  28. 168
  29. 320
  30. 192
  31. 152
  32. 264
  33. 296
  34. 216
  35. 144
  36. 80
  37. 256
  38. 160
  39. 168
  40. 220

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