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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 478 · 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. 1.24² =
  2. 2.15² =
  3. 3.26² =
  4. 4.18² =
  5. 5.19² =
  6. 6.25² =
  7. 7.21² =
  8. 8.12² =
  9. 9.28² =
  10. 10.11² =
  11. 11.17² =
  12. 12.23² =
  13. 13.29² =
  14. 14.14² =
  15. 15.22² =
  16. 16.27² =
  17. 17.16² =
  18. 18.12² =
  19. 19.26² =
  20. 20.13² =
  21. 21.27² =
  22. 22.23² =
  23. 23.13² =
  24. 24.24² =
  25. 25.21² =
  26. 26.12² =
  27. 27.22² =
  28. 28.24² =
  29. 29.28² =
  30. 30.19² =
  31. 31.25² =
  32. 32.27² =
  33. 33.15² =
  34. 34.11² =
  35. 35.24² =
  36. 36.13² =
  37. 37.22² =
  38. 38.11² =
  39. 39.18² =
  40. 40.23² =

Answer key

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

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