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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 983 · 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 × 8 =
  2. 2.20 × 8 =
  3. 3.27 × 8 =
  4. 4.22 × 8 =
  5. 5.66 × 4 =
  6. 6.64 × 4 =
  7. 7.32 × 8 =
  8. 8.46 × 4 =
  9. 9.19 × 8 =
  10. 10.30 × 8 =
  11. 11.28 × 8 =
  12. 12.34 × 4 =
  13. 13.48 × 4 =
  14. 14.58 × 4 =
  15. 15.21 × 8 =
  16. 16.23 × 8 =
  17. 17.20 × 4 =
  18. 18.14 × 8 =
  19. 19.27 × 4 =
  20. 20.37 × 4 =
  21. 21.14 × 4 =
  22. 22.13 × 8 =
  23. 23.74 × 4 =
  24. 24.12 × 4 =
  25. 25.42 × 4 =
  26. 26.35 × 8 =
  27. 27.16 × 8 =
  28. 28.18 × 8 =
  29. 29.26 × 4 =
  30. 30.16 × 4 =
  31. 31.19 × 4 =
  32. 32.33 × 4 =
  33. 33.30 × 4 =
  34. 34.55 × 4 =
  35. 35.31 × 8 =
  36. 36.69 × 4 =
  37. 37.60 × 4 =
  38. 38.67 × 4 =
  39. 39.32 × 4 =
  40. 40.24 × 8 =

Answer key

  1. 296
  2. 160
  3. 216
  4. 176
  5. 264
  6. 256
  7. 256
  8. 184
  9. 152
  10. 240
  11. 224
  12. 136
  13. 192
  14. 232
  15. 168
  16. 184
  17. 80
  18. 112
  19. 108
  20. 148
  21. 56
  22. 104
  23. 296
  24. 48
  25. 168
  26. 280
  27. 128
  28. 144
  29. 104
  30. 64
  31. 76
  32. 132
  33. 120
  34. 220
  35. 248
  36. 276
  37. 240
  38. 268
  39. 128
  40. 192

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