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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 966 · 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. 1.37 × 4 =
  2. 2.74 × 4 =
  3. 3.34 × 8 =
  4. 4.59 × 4 =
  5. 5.39 × 8 =
  6. 6.16 × 4 =
  7. 7.27 × 8 =
  8. 8.31 × 4 =
  9. 9.21 × 8 =
  10. 10.27 × 4 =
  11. 11.58 × 4 =
  12. 12.28 × 8 =
  13. 13.19 × 4 =
  14. 14.52 × 4 =
  15. 15.21 × 4 =
  16. 16.29 × 8 =
  17. 17.22 × 8 =
  18. 18.14 × 8 =
  19. 19.22 × 4 =
  20. 20.34 × 4 =
  21. 21.75 × 4 =
  22. 22.26 × 8 =
  23. 23.37 × 8 =
  24. 24.33 × 8 =
  25. 25.31 × 8 =
  26. 26.25 × 8 =
  27. 27.23 × 4 =
  28. 28.20 × 8 =
  29. 29.40 × 8 =
  30. 30.32 × 4 =
  31. 31.28 × 4 =
  32. 32.18 × 8 =
  33. 33.16 × 8 =
  34. 34.23 × 8 =
  35. 35.67 × 4 =
  36. 36.17 × 8 =
  37. 37.62 × 4 =
  38. 38.55 × 4 =
  39. 39.70 × 4 =
  40. 40.19 × 8 =

Answer key

  1. 148
  2. 296
  3. 272
  4. 236
  5. 312
  6. 64
  7. 216
  8. 124
  9. 168
  10. 108
  11. 232
  12. 224
  13. 76
  14. 208
  15. 84
  16. 232
  17. 176
  18. 112
  19. 88
  20. 136
  21. 300
  22. 208
  23. 296
  24. 264
  25. 248
  26. 200
  27. 92
  28. 160
  29. 320
  30. 128
  31. 112
  32. 144
  33. 128
  34. 184
  35. 268
  36. 136
  37. 248
  38. 220
  39. 280
  40. 152

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