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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 875 · 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. 1.13 × 8 =
  2. 2.39 × 8 =
  3. 3.27 × 8 =
  4. 4.49 × 4 =
  5. 5.60 × 4 =
  6. 6.48 × 4 =
  7. 7.30 × 4 =
  8. 8.54 × 4 =
  9. 9.26 × 8 =
  10. 10.28 × 4 =
  11. 11.17 × 4 =
  12. 12.36 × 8 =
  13. 13.29 × 8 =
  14. 14.35 × 8 =
  15. 15.59 × 4 =
  16. 16.15 × 8 =
  17. 17.71 × 4 =
  18. 18.33 × 8 =
  19. 19.33 × 4 =
  20. 20.56 × 4 =
  21. 21.63 × 4 =
  22. 22.19 × 8 =
  23. 23.37 × 8 =
  24. 24.57 × 4 =
  25. 25.12 × 4 =
  26. 26.21 × 4 =
  27. 27.68 × 4 =
  28. 28.12 × 8 =
  29. 29.14 × 8 =
  30. 30.51 × 4 =
  31. 31.30 × 8 =
  32. 32.14 × 4 =
  33. 33.28 × 8 =
  34. 34.21 × 8 =
  35. 35.29 × 4 =
  36. 36.36 × 4 =
  37. 37.40 × 8 =
  38. 38.70 × 4 =
  39. 39.16 × 8 =
  40. 40.66 × 4 =

Answer key

  1. 104
  2. 312
  3. 216
  4. 196
  5. 240
  6. 192
  7. 120
  8. 216
  9. 208
  10. 112
  11. 68
  12. 288
  13. 232
  14. 280
  15. 236
  16. 120
  17. 284
  18. 264
  19. 132
  20. 224
  21. 252
  22. 152
  23. 296
  24. 228
  25. 48
  26. 84
  27. 272
  28. 96
  29. 112
  30. 204
  31. 240
  32. 56
  33. 224
  34. 168
  35. 116
  36. 144
  37. 320
  38. 280
  39. 128
  40. 264

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