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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 124 · 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. 2.17² =
  3. 3.23² =
  4. 4.15² =
  5. 5.22² =
  6. 6.24² =
  7. 7.12² =
  8. 8.27² =
  9. 9.13² =
  10. 10.11² =
  11. 11.28² =
  12. 12.18² =
  13. 13.16² =
  14. 14.29² =
  15. 15.14² =
  16. 16.19² =
  17. 17.25² =
  18. 18.27² =
  19. 19.26² =
  20. 20.28² =
  21. 21.11² =
  22. 22.17² =
  23. 23.21² =
  24. 24.22² =
  25. 25.21² =
  26. 26.22² =
  27. 27.11² =
  28. 28.23² =
  29. 29.21² =
  30. 30.29² =
  31. 31.16² =
  32. 32.27² =
  33. 33.13² =
  34. 34.25² =
  35. 35.18² =
  36. 36.29² =
  37. 37.17² =
  38. 38.21² =
  39. 39.27² =
  40. 40.25² =

Answer key

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

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