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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 129 · 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. 1.21² =
  2. 2.24² =
  3. 3.15² =
  4. 4.12² =
  5. 5.14² =
  6. 6.28² =
  7. 7.13² =
  8. 8.19² =
  9. 9.18² =
  10. 10.23² =
  11. 11.27² =
  12. 12.11² =
  13. 13.17² =
  14. 14.16² =
  15. 15.22² =
  16. 16.25² =
  17. 17.29² =
  18. 18.26² =
  19. 19.13² =
  20. 20.29² =
  21. 21.11² =
  22. 22.29² =
  23. 23.14² =
  24. 24.13² =
  25. 25.24² =
  26. 26.13² =
  27. 27.16² =
  28. 28.25² =
  29. 29.23² =
  30. 30.23² =
  31. 31.24² =
  32. 32.17² =
  33. 33.14² =
  34. 34.18² =
  35. 35.17² =
  36. 36.26² =
  37. 37.21² =
  38. 38.26² =
  39. 39.13² =
  40. 40.13² =

Answer key

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

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