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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 548 · 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. 1.24² =
  2. 2.19² =
  3. 3.13² =
  4. 4.27² =
  5. 5.29² =
  6. 6.21² =
  7. 7.18² =
  8. 8.15² =
  9. 9.12² =
  10. 10.23² =
  11. 11.11² =
  12. 12.28² =
  13. 13.16² =
  14. 14.26² =
  15. 15.22² =
  16. 16.17² =
  17. 17.14² =
  18. 18.25² =
  19. 19.27² =
  20. 20.24² =
  21. 21.15² =
  22. 22.21² =
  23. 23.21² =
  24. 24.19² =
  25. 25.28² =
  26. 26.19² =
  27. 27.14² =
  28. 28.12² =
  29. 29.28² =
  30. 30.17² =
  31. 31.28² =
  32. 32.17² =
  33. 33.25² =
  34. 34.18² =
  35. 35.24² =
  36. 36.24² =
  37. 37.22² =
  38. 38.24² =
  39. 39.22² =
  40. 40.11² =

Answer key

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

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