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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 813 · 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. 1.13² =
  2. 2.28² =
  3. 3.22² =
  4. 4.29² =
  5. 5.18² =
  6. 6.16² =
  7. 7.23² =
  8. 8.14² =
  9. 9.26² =
  10. 10.19² =
  11. 11.17² =
  12. 12.24² =
  13. 13.21² =
  14. 14.12² =
  15. 15.11² =
  16. 16.25² =
  17. 17.15² =
  18. 18.23² =
  19. 19.27² =
  20. 20.22² =
  21. 21.13² =
  22. 22.16² =
  23. 23.14² =
  24. 24.12² =
  25. 25.24² =
  26. 26.17² =
  27. 27.29² =
  28. 28.24² =
  29. 29.24² =
  30. 30.27² =
  31. 31.11² =
  32. 32.23² =
  33. 33.15² =
  34. 34.16² =
  35. 35.19² =
  36. 36.21² =
  37. 37.21² =
  38. 38.27² =
  39. 39.19² =
  40. 40.13² =

Answer key

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

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