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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 742 · 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. 1.21² =
  2. 2.12² =
  3. 3.15² =
  4. 4.14² =
  5. 5.23² =
  6. 6.29² =
  7. 7.24² =
  8. 8.16² =
  9. 9.25² =
  10. 10.17² =
  11. 11.28² =
  12. 12.11² =
  13. 13.19² =
  14. 14.26² =
  15. 15.22² =
  16. 16.27² =
  17. 17.16² =
  18. 18.13² =
  19. 19.18² =
  20. 20.26² =
  21. 21.14² =
  22. 22.18² =
  23. 23.24² =
  24. 24.22² =
  25. 25.17² =
  26. 26.14² =
  27. 27.28² =
  28. 28.24² =
  29. 29.27² =
  30. 30.15² =
  31. 31.22² =
  32. 32.29² =
  33. 33.24² =
  34. 34.22² =
  35. 35.17² =
  36. 36.26² =
  37. 37.23² =
  38. 38.14² =
  39. 39.27² =
  40. 40.13² =

Answer key

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

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