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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 916 · 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. 1.31 × 8 =
  2. 2.15 × 4 =
  3. 3.21 × 8 =
  4. 4.26 × 8 =
  5. 5.49 × 4 =
  6. 6.20 × 8 =
  7. 7.27 × 8 =
  8. 8.26 × 4 =
  9. 9.65 × 4 =
  10. 10.66 × 4 =
  11. 11.20 × 4 =
  12. 12.40 × 8 =
  13. 13.50 × 4 =
  14. 14.22 × 8 =
  15. 15.28 × 8 =
  16. 16.60 × 4 =
  17. 17.17 × 4 =
  18. 18.47 × 4 =
  19. 19.19 × 8 =
  20. 20.31 × 4 =
  21. 21.29 × 8 =
  22. 22.35 × 4 =
  23. 23.57 × 4 =
  24. 24.37 × 8 =
  25. 25.33 × 8 =
  26. 26.38 × 8 =
  27. 27.63 × 4 =
  28. 28.71 × 4 =
  29. 29.13 × 8 =
  30. 30.33 × 4 =
  31. 31.46 × 4 =
  32. 32.25 × 8 =
  33. 33.17 × 8 =
  34. 34.23 × 8 =
  35. 35.54 × 4 =
  36. 36.40 × 4 =
  37. 37.41 × 4 =
  38. 38.39 × 8 =
  39. 39.13 × 4 =
  40. 40.52 × 4 =

Answer key

  1. 248
  2. 60
  3. 168
  4. 208
  5. 196
  6. 160
  7. 216
  8. 104
  9. 260
  10. 264
  11. 80
  12. 320
  13. 200
  14. 176
  15. 224
  16. 240
  17. 68
  18. 188
  19. 152
  20. 124
  21. 232
  22. 140
  23. 228
  24. 296
  25. 264
  26. 304
  27. 252
  28. 284
  29. 104
  30. 132
  31. 184
  32. 200
  33. 136
  34. 184
  35. 216
  36. 160
  37. 164
  38. 312
  39. 52
  40. 208

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