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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 136 · 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. 1.19² =
  2. 2.22² =
  3. 3.11² =
  4. 4.15² =
  5. 5.16² =
  6. 6.24² =
  7. 7.17² =
  8. 8.29² =
  9. 9.27² =
  10. 10.12² =
  11. 11.21² =
  12. 12.13² =
  13. 13.14² =
  14. 14.26² =
  15. 15.18² =
  16. 16.28² =
  17. 17.25² =
  18. 18.14² =
  19. 19.23² =
  20. 20.25² =
  21. 21.28² =
  22. 22.15² =
  23. 23.24² =
  24. 24.14² =
  25. 25.13² =
  26. 26.28² =
  27. 27.24² =
  28. 28.13² =
  29. 29.22² =
  30. 30.26² =
  31. 31.25² =
  32. 32.12² =
  33. 33.11² =
  34. 34.21² =
  35. 35.18² =
  36. 36.22² =
  37. 37.19² =
  38. 38.27² =
  39. 39.21² =
  40. 40.25² =

Answer key

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

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