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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 363 · 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. 1.12² =
  2. 2.26² =
  3. 3.15² =
  4. 4.27² =
  5. 5.13² =
  6. 6.14² =
  7. 7.11² =
  8. 8.17² =
  9. 9.21² =
  10. 10.25² =
  11. 11.29² =
  12. 12.28² =
  13. 13.19² =
  14. 14.23² =
  15. 15.16² =
  16. 16.24² =
  17. 17.29² =
  18. 18.11² =
  19. 19.22² =
  20. 20.18² =
  21. 21.13² =
  22. 22.14² =
  23. 23.14² =
  24. 24.14² =
  25. 25.13² =
  26. 26.22² =
  27. 27.23² =
  28. 28.29² =
  29. 29.11² =
  30. 30.21² =
  31. 31.17² =
  32. 32.17² =
  33. 33.19² =
  34. 34.21² =
  35. 35.22² =
  36. 36.15² =
  37. 37.26² =
  38. 38.27² =
  39. 39.13² =
  40. 40.27² =

Answer key

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

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