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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 237 · 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. 1.16² =
  2. 2.26² =
  3. 3.21² =
  4. 4.24² =
  5. 5.28² =
  6. 6.17² =
  7. 7.14² =
  8. 8.23² =
  9. 9.11² =
  10. 10.18² =
  11. 11.12² =
  12. 12.15² =
  13. 13.21² =
  14. 14.19² =
  15. 15.27² =
  16. 16.22² =
  17. 17.25² =
  18. 18.29² =
  19. 19.13² =
  20. 20.24² =
  21. 21.11² =
  22. 22.22² =
  23. 23.21² =
  24. 24.22² =
  25. 25.19² =
  26. 26.12² =
  27. 27.22² =
  28. 28.11² =
  29. 29.11² =
  30. 30.12² =
  31. 31.23² =
  32. 32.23² =
  33. 33.27² =
  34. 34.14² =
  35. 35.17² =
  36. 36.19² =
  37. 37.12² =
  38. 38.12² =
  39. 39.23² =
  40. 40.25² =

Answer key

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

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