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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 249 · 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. 1.22² =
  2. 2.28² =
  3. 3.23² =
  4. 4.19² =
  5. 5.21² =
  6. 6.26² =
  7. 7.24² =
  8. 8.15² =
  9. 9.29² =
  10. 10.27² =
  11. 11.13² =
  12. 12.17² =
  13. 13.12² =
  14. 14.25² =
  15. 15.16² =
  16. 16.11² =
  17. 17.18² =
  18. 18.25² =
  19. 19.14² =
  20. 20.23² =
  21. 21.22² =
  22. 22.24² =
  23. 23.24² =
  24. 24.11² =
  25. 25.12² =
  26. 26.12² =
  27. 27.15² =
  28. 28.13² =
  29. 29.13² =
  30. 30.21² =
  31. 31.27² =
  32. 32.28² =
  33. 33.22² =
  34. 34.16² =
  35. 35.21² =
  36. 36.24² =
  37. 37.19² =
  38. 38.19² =
  39. 39.24² =
  40. 40.18² =

Answer key

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

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