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Multiply by 4 and 8 Mental Maths Worksheet

Mental maths lesson 10: Multiply by 4 and 8 by doubling · Set 995 · 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. 2.29 × 4 =
  3. 3.22 × 8 =
  4. 4.12 × 8 =
  5. 5.52 × 4 =
  6. 6.37 × 8 =
  7. 7.34 × 4 =
  8. 8.70 × 4 =
  9. 9.24 × 8 =
  10. 10.19 × 8 =
  11. 11.39 × 8 =
  12. 12.14 × 8 =
  13. 13.24 × 4 =
  14. 14.16 × 4 =
  15. 15.32 × 8 =
  16. 16.26 × 8 =
  17. 17.72 × 4 =
  18. 18.39 × 4 =
  19. 19.31 × 8 =
  20. 20.22 × 4 =
  21. 21.54 × 4 =
  22. 22.30 × 4 =
  23. 23.75 × 4 =
  24. 24.35 × 4 =
  25. 25.30 × 8 =
  26. 26.34 × 8 =
  27. 27.20 × 8 =
  28. 28.13 × 8 =
  29. 29.17 × 8 =
  30. 30.58 × 4 =
  31. 31.43 × 4 =
  32. 32.71 × 4 =
  33. 33.44 × 4 =
  34. 34.40 × 4 =
  35. 35.16 × 8 =
  36. 36.29 × 8 =
  37. 37.35 × 8 =
  38. 38.69 × 4 =
  39. 39.38 × 8 =
  40. 40.55 × 4 =

Answer key

  1. 184
  2. 116
  3. 176
  4. 96
  5. 208
  6. 296
  7. 136
  8. 280
  9. 192
  10. 152
  11. 312
  12. 112
  13. 96
  14. 64
  15. 256
  16. 208
  17. 288
  18. 156
  19. 248
  20. 88
  21. 216
  22. 120
  23. 300
  24. 140
  25. 240
  26. 272
  27. 160
  28. 104
  29. 136
  30. 232
  31. 172
  32. 284
  33. 176
  34. 160
  35. 128
  36. 232
  37. 280
  38. 276
  39. 304
  40. 220

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