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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 229 · 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. 1.13² =
  2. 2.19² =
  3. 3.23² =
  4. 4.21² =
  5. 5.22² =
  6. 6.12² =
  7. 7.14² =
  8. 8.16² =
  9. 9.28² =
  10. 10.25² =
  11. 11.26² =
  12. 12.24² =
  13. 13.27² =
  14. 14.17² =
  15. 15.15² =
  16. 16.18² =
  17. 17.11² =
  18. 18.29² =
  19. 19.11² =
  20. 20.12² =
  21. 21.28² =
  22. 22.24² =
  23. 23.13² =
  24. 24.19² =
  25. 25.24² =
  26. 26.27² =
  27. 27.25² =
  28. 28.14² =
  29. 29.26² =
  30. 30.21² =
  31. 31.27² =
  32. 32.22² =
  33. 33.23² =
  34. 34.29² =
  35. 35.21² =
  36. 36.24² =
  37. 37.22² =
  38. 38.12² =
  39. 39.24² =
  40. 40.21² =

Answer key

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

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