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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 373 · 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. 2.16² =
  3. 3.17² =
  4. 4.24² =
  5. 5.25² =
  6. 6.18² =
  7. 7.14² =
  8. 8.19² =
  9. 9.15² =
  10. 10.11² =
  11. 11.22² =
  12. 12.27² =
  13. 13.12² =
  14. 14.13² =
  15. 15.21² =
  16. 16.23² =
  17. 17.26² =
  18. 18.28² =
  19. 19.15² =
  20. 20.28² =
  21. 21.24² =
  22. 22.24² =
  23. 23.13² =
  24. 24.28² =
  25. 25.19² =
  26. 26.11² =
  27. 27.27² =
  28. 28.13² =
  29. 29.14² =
  30. 30.24² =
  31. 31.17² =
  32. 32.21² =
  33. 33.16² =
  34. 34.15² =
  35. 35.25² =
  36. 36.13² =
  37. 37.18² =
  38. 38.17² =
  39. 39.22² =
  40. 40.23² =

Answer key

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

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