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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 580 · 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. 1.25² =
  2. 2.19² =
  3. 3.24² =
  4. 4.28² =
  5. 5.12² =
  6. 6.27² =
  7. 7.14² =
  8. 8.16² =
  9. 9.15² =
  10. 10.29² =
  11. 11.22² =
  12. 12.18² =
  13. 13.11² =
  14. 14.21² =
  15. 15.26² =
  16. 16.17² =
  17. 17.23² =
  18. 18.13² =
  19. 19.23² =
  20. 20.16² =
  21. 21.21² =
  22. 22.14² =
  23. 23.13² =
  24. 24.14² =
  25. 25.14² =
  26. 26.27² =
  27. 27.17² =
  28. 28.27² =
  29. 29.19² =
  30. 30.11² =
  31. 31.22² =
  32. 32.29² =
  33. 33.21² =
  34. 34.12² =
  35. 35.27² =
  36. 36.15² =
  37. 37.21² =
  38. 38.24² =
  39. 39.28² =
  40. 40.21² =

Answer key

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

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