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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 628 · 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. 1.23² =
  2. 2.21² =
  3. 3.22² =
  4. 4.26² =
  5. 5.11² =
  6. 6.17² =
  7. 7.12² =
  8. 8.13² =
  9. 9.28² =
  10. 10.15² =
  11. 11.27² =
  12. 12.19² =
  13. 13.25² =
  14. 14.24² =
  15. 15.29² =
  16. 16.14² =
  17. 17.16² =
  18. 18.18² =
  19. 19.15² =
  20. 20.23² =
  21. 21.27² =
  22. 22.27² =
  23. 23.22² =
  24. 24.18² =
  25. 25.14² =
  26. 26.25² =
  27. 27.27² =
  28. 28.11² =
  29. 29.21² =
  30. 30.13² =
  31. 31.15² =
  32. 32.12² =
  33. 33.13² =
  34. 34.17² =
  35. 35.21² =
  36. 36.16² =
  37. 37.14² =
  38. 38.15² =
  39. 39.28² =
  40. 40.12² =

Answer key

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

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