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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 945 · 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. 1.16 × 8 =
  2. 2.32 × 8 =
  3. 3.30 × 4 =
  4. 4.53 × 4 =
  5. 5.36 × 8 =
  6. 6.18 × 8 =
  7. 7.51 × 4 =
  8. 8.34 × 8 =
  9. 9.12 × 4 =
  10. 10.13 × 8 =
  11. 11.23 × 4 =
  12. 12.68 × 4 =
  13. 13.63 × 4 =
  14. 14.74 × 4 =
  15. 15.43 × 4 =
  16. 16.29 × 8 =
  17. 17.29 × 4 =
  18. 18.14 × 8 =
  19. 19.35 × 8 =
  20. 20.65 × 4 =
  21. 21.17 × 4 =
  22. 22.18 × 4 =
  23. 23.25 × 8 =
  24. 24.21 × 8 =
  25. 25.38 × 8 =
  26. 26.59 × 4 =
  27. 27.72 × 4 =
  28. 28.38 × 4 =
  29. 29.73 × 4 =
  30. 30.15 × 8 =
  31. 31.54 × 4 =
  32. 32.46 × 4 =
  33. 33.12 × 8 =
  34. 34.37 × 8 =
  35. 35.24 × 4 =
  36. 36.33 × 4 =
  37. 37.20 × 8 =
  38. 38.17 × 8 =
  39. 39.16 × 4 =
  40. 40.58 × 4 =

Answer key

  1. 128
  2. 256
  3. 120
  4. 212
  5. 288
  6. 144
  7. 204
  8. 272
  9. 48
  10. 104
  11. 92
  12. 272
  13. 252
  14. 296
  15. 172
  16. 232
  17. 116
  18. 112
  19. 280
  20. 260
  21. 68
  22. 72
  23. 200
  24. 168
  25. 304
  26. 236
  27. 288
  28. 152
  29. 292
  30. 120
  31. 216
  32. 184
  33. 96
  34. 296
  35. 96
  36. 132
  37. 160
  38. 136
  39. 64
  40. 232

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