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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 786 · 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. 4.29² =
  5. 5.17² =
  6. 6.11² =
  7. 7.12² =
  8. 8.25² =
  9. 9.26² =
  10. 10.23² =
  11. 11.22² =
  12. 12.14² =
  13. 13.27² =
  14. 14.13² =
  15. 15.16² =
  16. 16.18² =
  17. 17.19² =
  18. 18.28² =
  19. 19.26² =
  20. 20.21² =
  21. 21.11² =
  22. 22.29² =
  23. 23.12² =
  24. 24.24² =
  25. 25.11² =
  26. 26.19² =
  27. 27.22² =
  28. 28.13² =
  29. 29.25² =
  30. 30.24² =
  31. 31.13² =
  32. 32.23² =
  33. 33.15² =
  34. 34.17² =
  35. 35.13² =
  36. 36.19² =
  37. 37.26² =
  38. 38.22² =
  39. 39.22² =
  40. 40.13² =

Answer key

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

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