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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 45 · 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. 1.15² =
  2. 2.13² =
  3. 3.25² =
  4. 4.14² =
  5. 5.12² =
  6. 6.21² =
  7. 7.11² =
  8. 8.19² =
  9. 9.23² =
  10. 10.16² =
  11. 11.28² =
  12. 12.27² =
  13. 13.29² =
  14. 14.17² =
  15. 15.26² =
  16. 16.24² =
  17. 17.18² =
  18. 18.23² =
  19. 19.22² =
  20. 20.12² =
  21. 21.22² =
  22. 22.22² =
  23. 23.15² =
  24. 24.13² =
  25. 25.15² =
  26. 26.14² =
  27. 27.28² =
  28. 28.25² =
  29. 29.22² =
  30. 30.13² =
  31. 31.23² =
  32. 32.17² =
  33. 33.26² =
  34. 34.17² =
  35. 35.25² =
  36. 36.19² =
  37. 37.29² =
  38. 38.17² =
  39. 39.27² =
  40. 40.16² =

Answer key

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

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