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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 644 · 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. 2.23² =
  3. 3.15² =
  4. 4.12² =
  5. 5.26² =
  6. 6.28² =
  7. 7.19² =
  8. 8.13² =
  9. 9.11² =
  10. 10.27² =
  11. 11.21² =
  12. 12.17² =
  13. 13.25² =
  14. 14.16² =
  15. 15.29² =
  16. 16.22² =
  17. 17.18² =
  18. 18.21² =
  19. 19.15² =
  20. 20.15² =
  21. 21.17² =
  22. 22.23² =
  23. 23.15² =
  24. 24.14² =
  25. 25.21² =
  26. 26.26² =
  27. 27.27² =
  28. 28.13² =
  29. 29.24² =
  30. 30.23² =
  31. 31.28² =
  32. 32.22² =
  33. 33.25² =
  34. 34.16² =
  35. 35.21² =
  36. 36.15² =
  37. 37.29² =
  38. 38.19² =
  39. 39.23² =
  40. 40.13² =

Answer key

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

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