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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 900 · 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. 1.23² =
  2. 2.25² =
  3. 3.26² =
  4. 4.16² =
  5. 5.11² =
  6. 6.22² =
  7. 7.12² =
  8. 8.18² =
  9. 9.21² =
  10. 10.15² =
  11. 11.27² =
  12. 12.28² =
  13. 13.14² =
  14. 14.29² =
  15. 15.23² =
  16. 16.17² =
  17. 17.15² =
  18. 18.24² =
  19. 19.19² =
  20. 20.12² =
  21. 21.23² =
  22. 22.13² =
  23. 23.11² =
  24. 24.24² =
  25. 25.15² =
  26. 26.25² =
  27. 27.16² =
  28. 28.24² =
  29. 29.14² =
  30. 30.28² =
  31. 31.17² =
  32. 32.25² =
  33. 33.26² =
  34. 34.21² =
  35. 35.23² =
  36. 36.23² =
  37. 37.28² =
  38. 38.15² =
  39. 39.27² =
  40. 40.21² =

Answer key

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

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