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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 36 · 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. 1.12² =
  2. 2.25² =
  3. 3.23² =
  4. 4.26² =
  5. 5.27² =
  6. 6.21² =
  7. 7.18² =
  8. 8.24² =
  9. 9.28² =
  10. 10.16² =
  11. 11.29² =
  12. 12.14² =
  13. 13.17² =
  14. 14.19² =
  15. 15.22² =
  16. 16.15² =
  17. 17.13² =
  18. 18.11² =
  19. 19.16² =
  20. 20.19² =
  21. 21.25² =
  22. 22.13² =
  23. 23.27² =
  24. 24.12² =
  25. 25.12² =
  26. 26.26² =
  27. 27.17² =
  28. 28.25² =
  29. 29.21² =
  30. 30.29² =
  31. 31.28² =
  32. 32.28² =
  33. 33.19² =
  34. 34.12² =
  35. 35.24² =
  36. 36.12² =
  37. 37.28² =
  38. 38.11² =
  39. 39.22² =
  40. 40.13² =

Answer key

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

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