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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 186 · 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. 1.25² =
  2. 2.12² =
  3. 3.22² =
  4. 4.16² =
  5. 5.28² =
  6. 6.19² =
  7. 7.23² =
  8. 8.21² =
  9. 9.27² =
  10. 10.11² =
  11. 11.13² =
  12. 12.29² =
  13. 13.24² =
  14. 14.18² =
  15. 15.14² =
  16. 16.15² =
  17. 17.17² =
  18. 18.26² =
  19. 19.16² =
  20. 20.13² =
  21. 21.21² =
  22. 22.24² =
  23. 23.22² =
  24. 24.27² =
  25. 25.23² =
  26. 26.19² =
  27. 27.29² =
  28. 28.27² =
  29. 29.13² =
  30. 30.25² =
  31. 31.22² =
  32. 32.22² =
  33. 33.25² =
  34. 34.28² =
  35. 35.14² =
  36. 36.25² =
  37. 37.29² =
  38. 38.13² =
  39. 39.11² =
  40. 40.26² =

Answer key

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

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