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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 402 · 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. 2.22² =
  3. 3.23² =
  4. 4.14² =
  5. 5.18² =
  6. 6.19² =
  7. 7.13² =
  8. 8.26² =
  9. 9.29² =
  10. 10.15² =
  11. 11.24² =
  12. 12.21² =
  13. 13.25² =
  14. 14.16² =
  15. 15.12² =
  16. 16.11² =
  17. 17.28² =
  18. 18.27² =
  19. 19.22² =
  20. 20.15² =
  21. 21.16² =
  22. 22.26² =
  23. 23.12² =
  24. 24.13² =
  25. 25.19² =
  26. 26.13² =
  27. 27.14² =
  28. 28.21² =
  29. 29.15² =
  30. 30.23² =
  31. 31.24² =
  32. 32.11² =
  33. 33.25² =
  34. 34.13² =
  35. 35.12² =
  36. 36.11² =
  37. 37.22² =
  38. 38.28² =
  39. 39.19² =
  40. 40.29² =

Answer key

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

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