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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 900 · 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. 1.23 × 8 =
  2. 2.47 × 4 =
  3. 3.18 × 8 =
  4. 4.38 × 8 =
  5. 5.30 × 4 =
  6. 6.16 × 8 =
  7. 7.13 × 4 =
  8. 8.40 × 8 =
  9. 9.15 × 8 =
  10. 10.36 × 8 =
  11. 11.50 × 4 =
  12. 12.12 × 8 =
  13. 13.35 × 8 =
  14. 14.42 × 4 =
  15. 15.13 × 8 =
  16. 16.30 × 8 =
  17. 17.27 × 8 =
  18. 18.25 × 8 =
  19. 19.58 × 4 =
  20. 20.57 × 4 =
  21. 21.62 × 4 =
  22. 22.32 × 4 =
  23. 23.31 × 8 =
  24. 24.39 × 4 =
  25. 25.31 × 4 =
  26. 26.24 × 4 =
  27. 27.35 × 4 =
  28. 28.56 × 4 =
  29. 29.20 × 4 =
  30. 30.34 × 8 =
  31. 31.51 × 4 =
  32. 32.68 × 4 =
  33. 33.14 × 4 =
  34. 34.65 × 4 =
  35. 35.33 × 8 =
  36. 36.34 × 4 =
  37. 37.19 × 4 =
  38. 38.61 × 4 =
  39. 39.22 × 8 =
  40. 40.27 × 4 =

Answer key

  1. 184
  2. 188
  3. 144
  4. 304
  5. 120
  6. 128
  7. 52
  8. 320
  9. 120
  10. 288
  11. 200
  12. 96
  13. 280
  14. 168
  15. 104
  16. 240
  17. 216
  18. 200
  19. 232
  20. 228
  21. 248
  22. 128
  23. 248
  24. 156
  25. 124
  26. 96
  27. 140
  28. 224
  29. 80
  30. 272
  31. 204
  32. 272
  33. 56
  34. 260
  35. 264
  36. 136
  37. 76
  38. 244
  39. 176
  40. 108

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