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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 700 · 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. 2.27² =
  3. 3.14² =
  4. 4.24² =
  5. 5.16² =
  6. 6.29² =
  7. 7.21² =
  8. 8.22² =
  9. 9.17² =
  10. 10.18² =
  11. 11.12² =
  12. 12.19² =
  13. 13.28² =
  14. 14.25² =
  15. 15.15² =
  16. 16.26² =
  17. 17.11² =
  18. 18.27² =
  19. 19.29² =
  20. 20.15² =
  21. 21.15² =
  22. 22.16² =
  23. 23.13² =
  24. 24.21² =
  25. 25.13² =
  26. 26.13² =
  27. 27.12² =
  28. 28.17² =
  29. 29.23² =
  30. 30.16² =
  31. 31.21² =
  32. 32.29² =
  33. 33.26² =
  34. 34.12² =
  35. 35.24² =
  36. 36.18² =
  37. 37.24² =
  38. 38.12² =
  39. 39.27² =
  40. 40.13² =

Answer key

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

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