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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 59 · 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. 2.15² =
  3. 3.29² =
  4. 4.16² =
  5. 5.25² =
  6. 6.28² =
  7. 7.14² =
  8. 8.26² =
  9. 9.12² =
  10. 10.23² =
  11. 11.11² =
  12. 12.18² =
  13. 13.19² =
  14. 14.27² =
  15. 15.17² =
  16. 16.24² =
  17. 17.21² =
  18. 18.18² =
  19. 19.25² =
  20. 20.21² =
  21. 21.22² =
  22. 22.27² =
  23. 23.29² =
  24. 24.18² =
  25. 25.13² =
  26. 26.24² =
  27. 27.15² =
  28. 28.21² =
  29. 29.22² =
  30. 30.21² =
  31. 31.21² =
  32. 32.21² =
  33. 33.21² =
  34. 34.28² =
  35. 35.27² =
  36. 36.28² =
  37. 37.24² =
  38. 38.27² =
  39. 39.23² =
  40. 40.29² =

Answer key

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

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