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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 196 · 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. 1.27² =
  2. 2.15² =
  3. 3.18² =
  4. 4.29² =
  5. 5.13² =
  6. 6.25² =
  7. 7.12² =
  8. 8.14² =
  9. 9.16² =
  10. 10.26² =
  11. 11.17² =
  12. 12.24² =
  13. 13.21² =
  14. 14.19² =
  15. 15.22² =
  16. 16.23² =
  17. 17.22² =
  18. 18.28² =
  19. 19.14² =
  20. 20.11² =
  21. 21.23² =
  22. 22.21² =
  23. 23.14² =
  24. 24.19² =
  25. 25.18² =
  26. 26.23² =
  27. 27.14² =
  28. 28.21² =
  29. 29.18² =
  30. 30.29² =
  31. 31.13² =
  32. 32.13² =
  33. 33.12² =
  34. 34.25² =
  35. 35.14² =
  36. 36.22² =
  37. 37.17² =
  38. 38.13² =
  39. 39.22² =
  40. 40.12² =

Answer key

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

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