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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 632 · 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. 1.13² =
  2. 2.23² =
  3. 3.22² =
  4. 4.17² =
  5. 5.25² =
  6. 6.21² =
  7. 7.12² =
  8. 8.14² =
  9. 9.26² =
  10. 10.24² =
  11. 11.11² =
  12. 12.19² =
  13. 13.27² =
  14. 14.28² =
  15. 15.15² =
  16. 16.25² =
  17. 17.16² =
  18. 18.25² =
  19. 19.11² =
  20. 20.18² =
  21. 21.25² =
  22. 22.29² =
  23. 23.15² =
  24. 24.14² =
  25. 25.22² =
  26. 26.18² =
  27. 27.21² =
  28. 28.22² =
  29. 29.11² =
  30. 30.18² =
  31. 31.16² =
  32. 32.17² =
  33. 33.24² =
  34. 34.29² =
  35. 35.13² =
  36. 36.13² =
  37. 37.19² =
  38. 38.26² =
  39. 39.13² =
  40. 40.14² =

Answer key

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

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