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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 924 · 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. 1.34 × 4 =
  2. 2.19 × 4 =
  3. 3.35 × 4 =
  4. 4.33 × 8 =
  5. 5.74 × 4 =
  6. 6.13 × 8 =
  7. 7.26 × 8 =
  8. 8.36 × 4 =
  9. 9.48 × 4 =
  10. 10.66 × 4 =
  11. 11.25 × 8 =
  12. 12.20 × 8 =
  13. 13.35 × 8 =
  14. 14.64 × 4 =
  15. 15.27 × 8 =
  16. 16.16 × 8 =
  17. 17.15 × 8 =
  18. 18.21 × 4 =
  19. 19.12 × 4 =
  20. 20.23 × 4 =
  21. 21.59 × 4 =
  22. 22.67 × 4 =
  23. 23.29 × 8 =
  24. 24.13 × 4 =
  25. 25.50 × 4 =
  26. 26.40 × 4 =
  27. 27.57 × 4 =
  28. 28.34 × 8 =
  29. 29.37 × 4 =
  30. 30.70 × 4 =
  31. 31.71 × 4 =
  32. 32.15 × 4 =
  33. 33.24 × 8 =
  34. 34.38 × 4 =
  35. 35.19 × 8 =
  36. 36.17 × 4 =
  37. 37.40 × 8 =
  38. 38.39 × 4 =
  39. 39.36 × 8 =
  40. 40.42 × 4 =

Answer key

  1. 136
  2. 76
  3. 140
  4. 264
  5. 296
  6. 104
  7. 208
  8. 144
  9. 192
  10. 264
  11. 200
  12. 160
  13. 280
  14. 256
  15. 216
  16. 128
  17. 120
  18. 84
  19. 48
  20. 92
  21. 236
  22. 268
  23. 232
  24. 52
  25. 200
  26. 160
  27. 228
  28. 272
  29. 148
  30. 280
  31. 284
  32. 60
  33. 192
  34. 152
  35. 152
  36. 68
  37. 320
  38. 156
  39. 288
  40. 168

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