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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 160 · 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. 1.17² =
  2. 2.13² =
  3. 3.15² =
  4. 4.25² =
  5. 5.12² =
  6. 6.18² =
  7. 7.29² =
  8. 8.19² =
  9. 9.23² =
  10. 10.24² =
  11. 11.22² =
  12. 12.14² =
  13. 13.16² =
  14. 14.26² =
  15. 15.11² =
  16. 16.19² =
  17. 17.22² =
  18. 18.26² =
  19. 19.21² =
  20. 20.25² =
  21. 21.27² =
  22. 22.21² =
  23. 23.24² =
  24. 24.21² =
  25. 25.24² =
  26. 26.22² =
  27. 27.28² =
  28. 28.26² =
  29. 29.19² =
  30. 30.27² =
  31. 31.17² =
  32. 32.29² =
  33. 33.22² =
  34. 34.21² =
  35. 35.12² =
  36. 36.28² =
  37. 37.25² =
  38. 38.13² =
  39. 39.14² =
  40. 40.11² =

Answer key

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

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