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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 89 · 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. 1.14² =
  2. 2.15² =
  3. 3.22² =
  4. 4.11² =
  5. 5.16² =
  6. 6.21² =
  7. 7.12² =
  8. 8.18² =
  9. 9.13² =
  10. 10.27² =
  11. 11.24² =
  12. 12.25² =
  13. 13.19² =
  14. 14.17² =
  15. 15.23² =
  16. 16.29² =
  17. 17.14² =
  18. 18.26² =
  19. 19.19² =
  20. 20.22² =
  21. 21.23² =
  22. 22.17² =
  23. 23.17² =
  24. 24.28² =
  25. 25.17² =
  26. 26.15² =
  27. 27.15² =
  28. 28.25² =
  29. 29.16² =
  30. 30.21² =
  31. 31.17² =
  32. 32.24² =
  33. 33.19² =
  34. 34.18² =
  35. 35.23² =
  36. 36.27² =
  37. 37.16² =
  38. 38.12² =
  39. 39.19² =
  40. 40.23² =

Answer key

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

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