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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 370 · 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. 2.19² =
  3. 3.21² =
  4. 4.12² =
  5. 5.17² =
  6. 6.26² =
  7. 7.28² =
  8. 8.29² =
  9. 9.18² =
  10. 10.23² =
  11. 11.22² =
  12. 12.14² =
  13. 13.13² =
  14. 14.25² =
  15. 15.27² =
  16. 16.16² =
  17. 17.21² =
  18. 18.11² =
  19. 19.23² =
  20. 20.29² =
  21. 21.18² =
  22. 22.24² =
  23. 23.23² =
  24. 24.21² =
  25. 25.24² =
  26. 26.15² =
  27. 27.23² =
  28. 28.16² =
  29. 29.29² =
  30. 30.18² =
  31. 31.14² =
  32. 32.11² =
  33. 33.21² =
  34. 34.15² =
  35. 35.24² =
  36. 36.21² =
  37. 37.22² =
  38. 38.17² =
  39. 39.22² =
  40. 40.19² =

Answer key

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

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