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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 964 · 40 questions
TalentJR

How to do it in your head ((a + b)²): Split: 27 = 20 + 7. Find 20² = 400, 2 × 20 × 7 = 280 and 7² = 49. Add, biggest first: 400 + 280 + 49.

NameDateTime takenScore ___ / 40
  1. 1.25² =
  2. 2.26² =
  3. 3.29² =
  4. 4.15² =
  5. 5.24² =
  6. 6.23² =
  7. 7.21² =
  8. 8.12² =
  9. 9.14² =
  10. 10.17² =
  11. 11.13² =
  12. 12.19² =
  13. 13.16² =
  14. 14.27² =
  15. 15.18² =
  16. 16.11² =
  17. 17.28² =
  18. 18.22² =
  19. 19.13² =
  20. 20.13² =
  21. 21.12² =
  22. 22.17² =
  23. 23.14² =
  24. 24.13² =
  25. 25.23² =
  26. 26.24² =
  27. 27.14² =
  28. 28.12² =
  29. 29.16² =
  30. 30.11² =
  31. 31.29² =
  32. 32.26² =
  33. 33.27² =
  34. 34.27² =
  35. 35.29² =
  36. 36.21² =
  37. 37.23² =
  38. 38.11² =
  39. 39.18² =
  40. 40.23² =

Answer key

  1. 625
  2. 676
  3. 841
  4. 225
  5. 576
  6. 529
  7. 441
  8. 144
  9. 196
  10. 289
  11. 169
  12. 361
  13. 256
  14. 729
  15. 324
  16. 121
  17. 784
  18. 484
  19. 169
  20. 169
  21. 144
  22. 289
  23. 196
  24. 169
  25. 529
  26. 576
  27. 196
  28. 144
  29. 256
  30. 121
  31. 841
  32. 676
  33. 729
  34. 729
  35. 841
  36. 441
  37. 529
  38. 121
  39. 324
  40. 529

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