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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 416 · 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. 1.17² =
  2. 2.18² =
  3. 3.25² =
  4. 4.21² =
  5. 5.23² =
  6. 6.24² =
  7. 7.14² =
  8. 8.12² =
  9. 9.27² =
  10. 10.16² =
  11. 11.11² =
  12. 12.22² =
  13. 13.15² =
  14. 14.26² =
  15. 15.28² =
  16. 16.19² =
  17. 17.13² =
  18. 18.19² =
  19. 19.25² =
  20. 20.29² =
  21. 21.24² =
  22. 22.19² =
  23. 23.21² =
  24. 24.24² =
  25. 25.15² =
  26. 26.21² =
  27. 27.11² =
  28. 28.29² =
  29. 29.21² =
  30. 30.21² =
  31. 31.11² =
  32. 32.25² =
  33. 33.24² =
  34. 34.16² =
  35. 35.15² =
  36. 36.24² =
  37. 37.21² =
  38. 38.13² =
  39. 39.22² =
  40. 40.25² =

Answer key

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

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