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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 606 · 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. 1.16² =
  2. 2.25² =
  3. 3.11² =
  4. 4.13² =
  5. 5.29² =
  6. 6.12² =
  7. 7.28² =
  8. 8.14² =
  9. 9.27² =
  10. 10.21² =
  11. 11.26² =
  12. 12.15² =
  13. 13.23² =
  14. 14.18² =
  15. 15.19² =
  16. 16.22² =
  17. 17.24² =
  18. 18.21² =
  19. 19.24² =
  20. 20.17² =
  21. 21.27² =
  22. 22.11² =
  23. 23.24² =
  24. 24.12² =
  25. 25.15² =
  26. 26.27² =
  27. 27.16² =
  28. 28.18² =
  29. 29.29² =
  30. 30.19² =
  31. 31.25² =
  32. 32.22² =
  33. 33.15² =
  34. 34.17² =
  35. 35.21² =
  36. 36.28² =
  37. 37.13² =
  38. 38.19² =
  39. 39.14² =
  40. 40.25² =

Answer key

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

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