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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 518 · 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. 2.13² =
  3. 3.22² =
  4. 4.25² =
  5. 5.15² =
  6. 6.21² =
  7. 7.26² =
  8. 8.18² =
  9. 9.14² =
  10. 10.16² =
  11. 11.19² =
  12. 12.17² =
  13. 13.23² =
  14. 14.11² =
  15. 15.12² =
  16. 16.24² =
  17. 17.23² =
  18. 18.27² =
  19. 19.28² =
  20. 20.17² =
  21. 21.22² =
  22. 22.24² =
  23. 23.17² =
  24. 24.11² =
  25. 25.27² =
  26. 26.12² =
  27. 27.27² =
  28. 28.21² =
  29. 29.11² =
  30. 30.14² =
  31. 31.17² =
  32. 32.23² =
  33. 33.16² =
  34. 34.22² =
  35. 35.11² =
  36. 36.21² =
  37. 37.13² =
  38. 38.16² =
  39. 39.19² =
  40. 40.15² =

Answer key

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

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