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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 745 · 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. 1.29² =
  2. 2.21² =
  3. 3.14² =
  4. 4.11² =
  5. 5.27² =
  6. 6.15² =
  7. 7.23² =
  8. 8.12² =
  9. 9.19² =
  10. 10.25² =
  11. 11.22² =
  12. 12.13² =
  13. 13.17² =
  14. 14.18² =
  15. 15.16² =
  16. 16.26² =
  17. 17.28² =
  18. 18.18² =
  19. 19.24² =
  20. 20.24² =
  21. 21.27² =
  22. 22.23² =
  23. 23.23² =
  24. 24.11² =
  25. 25.27² =
  26. 26.13² =
  27. 27.17² =
  28. 28.13² =
  29. 29.11² =
  30. 30.27² =
  31. 31.19² =
  32. 32.21² =
  33. 33.28² =
  34. 34.15² =
  35. 35.21² =
  36. 36.13² =
  37. 37.19² =
  38. 38.18² =
  39. 39.23² =
  40. 40.21² =

Answer key

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

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