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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 609 · 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. 1.22² =
  2. 2.21² =
  3. 3.12² =
  4. 4.29² =
  5. 5.18² =
  6. 6.23² =
  7. 7.24² =
  8. 8.11² =
  9. 9.28² =
  10. 10.17² =
  11. 11.15² =
  12. 12.25² =
  13. 13.27² =
  14. 14.14² =
  15. 15.19² =
  16. 16.13² =
  17. 17.26² =
  18. 18.16² =
  19. 19.26² =
  20. 20.18² =
  21. 21.27² =
  22. 22.24² =
  23. 23.25² =
  24. 24.12² =
  25. 25.13² =
  26. 26.23² =
  27. 27.12² =
  28. 28.16² =
  29. 29.17² =
  30. 30.21² =
  31. 31.27² =
  32. 32.26² =
  33. 33.27² =
  34. 34.14² =
  35. 35.24² =
  36. 36.23² =
  37. 37.19² =
  38. 38.17² =
  39. 39.21² =
  40. 40.16² =

Answer key

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

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