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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 293 · 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. 1.23² =
  2. 2.22² =
  3. 3.12² =
  4. 4.26² =
  5. 5.25² =
  6. 6.19² =
  7. 7.14² =
  8. 8.21² =
  9. 9.17² =
  10. 10.24² =
  11. 11.27² =
  12. 12.11² =
  13. 13.18² =
  14. 14.15² =
  15. 15.29² =
  16. 16.28² =
  17. 17.16² =
  18. 18.13² =
  19. 19.16² =
  20. 20.23² =
  21. 21.22² =
  22. 22.27² =
  23. 23.11² =
  24. 24.17² =
  25. 25.29² =
  26. 26.21² =
  27. 27.12² =
  28. 28.22² =
  29. 29.13² =
  30. 30.12² =
  31. 31.27² =
  32. 32.18² =
  33. 33.23² =
  34. 34.18² =
  35. 35.18² =
  36. 36.21² =
  37. 37.25² =
  38. 38.22² =
  39. 39.21² =
  40. 40.27² =

Answer key

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

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