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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 584 · 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. 2.11² =
  3. 3.22² =
  4. 4.23² =
  5. 5.12² =
  6. 6.21² =
  7. 7.15² =
  8. 8.13² =
  9. 9.27² =
  10. 10.25² =
  11. 11.26² =
  12. 12.29² =
  13. 13.18² =
  14. 14.14² =
  15. 15.17² =
  16. 16.19² =
  17. 17.23² =
  18. 18.24² =
  19. 19.11² =
  20. 20.28² =
  21. 21.23² =
  22. 22.24² =
  23. 23.23² =
  24. 24.22² =
  25. 25.19² =
  26. 26.13² =
  27. 27.16² =
  28. 28.21² =
  29. 29.12² =
  30. 30.23² =
  31. 31.27² =
  32. 32.19² =
  33. 33.27² =
  34. 34.18² =
  35. 35.21² =
  36. 36.27² =
  37. 37.11² =
  38. 38.13² =
  39. 39.19² =
  40. 40.12² =

Answer key

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

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