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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 955 · 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. 1.54 × 4 =
  2. 2.22 × 8 =
  3. 3.27 × 8 =
  4. 4.17 × 8 =
  5. 5.19 × 4 =
  6. 6.13 × 4 =
  7. 7.23 × 8 =
  8. 8.62 × 4 =
  9. 9.58 × 4 =
  10. 10.59 × 4 =
  11. 11.33 × 8 =
  12. 12.72 × 4 =
  13. 13.16 × 8 =
  14. 14.19 × 8 =
  15. 15.55 × 4 =
  16. 16.49 × 4 =
  17. 17.40 × 4 =
  18. 18.74 × 4 =
  19. 19.26 × 8 =
  20. 20.24 × 4 =
  21. 21.20 × 4 =
  22. 22.26 × 4 =
  23. 23.14 × 8 =
  24. 24.39 × 4 =
  25. 25.32 × 8 =
  26. 26.15 × 8 =
  27. 27.30 × 8 =
  28. 28.73 × 4 =
  29. 29.21 × 8 =
  30. 30.35 × 8 =
  31. 31.12 × 8 =
  32. 32.50 × 4 =
  33. 33.40 × 8 =
  34. 34.36 × 8 =
  35. 35.36 × 4 =
  36. 36.30 × 4 =
  37. 37.31 × 4 =
  38. 38.34 × 8 =
  39. 39.44 × 4 =
  40. 40.70 × 4 =

Answer key

  1. 216
  2. 176
  3. 216
  4. 136
  5. 76
  6. 52
  7. 184
  8. 248
  9. 232
  10. 236
  11. 264
  12. 288
  13. 128
  14. 152
  15. 220
  16. 196
  17. 160
  18. 296
  19. 208
  20. 96
  21. 80
  22. 104
  23. 112
  24. 156
  25. 256
  26. 120
  27. 240
  28. 292
  29. 168
  30. 280
  31. 96
  32. 200
  33. 320
  34. 288
  35. 144
  36. 120
  37. 124
  38. 272
  39. 176
  40. 280

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