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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 115 · 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. 1.26² =
  2. 2.17² =
  3. 3.21² =
  4. 4.18² =
  5. 5.11² =
  6. 6.14² =
  7. 7.13² =
  8. 8.28² =
  9. 9.19² =
  10. 10.24² =
  11. 11.16² =
  12. 12.12² =
  13. 13.29² =
  14. 14.15² =
  15. 15.22² =
  16. 16.23² =
  17. 17.14² =
  18. 18.25² =
  19. 19.27² =
  20. 20.12² =
  21. 21.27² =
  22. 22.12² =
  23. 23.24² =
  24. 24.19² =
  25. 25.21² =
  26. 26.24² =
  27. 27.12² =
  28. 28.11² =
  29. 29.15² =
  30. 30.27² =
  31. 31.17² =
  32. 32.19² =
  33. 33.24² =
  34. 34.12² =
  35. 35.19² =
  36. 36.14² =
  37. 37.29² =
  38. 38.21² =
  39. 39.27² =
  40. 40.27² =

Answer key

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

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