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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 925 · 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. 1.72 × 4 =
  2. 2.19 × 8 =
  3. 3.15 × 8 =
  4. 4.31 × 4 =
  5. 5.39 × 8 =
  6. 6.25 × 8 =
  7. 7.36 × 8 =
  8. 8.21 × 4 =
  9. 9.20 × 4 =
  10. 10.68 × 4 =
  11. 11.23 × 8 =
  12. 12.26 × 4 =
  13. 13.21 × 8 =
  14. 14.20 × 8 =
  15. 15.31 × 8 =
  16. 16.13 × 4 =
  17. 17.13 × 8 =
  18. 18.55 × 4 =
  19. 19.30 × 4 =
  20. 20.22 × 4 =
  21. 21.65 × 4 =
  22. 22.32 × 4 =
  23. 23.53 × 4 =
  24. 24.26 × 8 =
  25. 25.73 × 4 =
  26. 26.27 × 8 =
  27. 27.50 × 4 =
  28. 28.32 × 8 =
  29. 29.24 × 8 =
  30. 30.14 × 8 =
  31. 31.44 × 4 =
  32. 32.38 × 8 =
  33. 33.63 × 4 =
  34. 34.74 × 4 =
  35. 35.71 × 4 =
  36. 36.58 × 4 =
  37. 37.33 × 4 =
  38. 38.43 × 4 =
  39. 39.37 × 8 =
  40. 40.14 × 4 =

Answer key

  1. 288
  2. 152
  3. 120
  4. 124
  5. 312
  6. 200
  7. 288
  8. 84
  9. 80
  10. 272
  11. 184
  12. 104
  13. 168
  14. 160
  15. 248
  16. 52
  17. 104
  18. 220
  19. 120
  20. 88
  21. 260
  22. 128
  23. 212
  24. 208
  25. 292
  26. 216
  27. 200
  28. 256
  29. 192
  30. 112
  31. 176
  32. 304
  33. 252
  34. 296
  35. 284
  36. 232
  37. 132
  38. 172
  39. 296
  40. 56

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