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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 190 · 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. 2.22² =
  3. 3.23² =
  4. 4.17² =
  5. 5.27² =
  6. 6.18² =
  7. 7.21² =
  8. 8.16² =
  9. 9.28² =
  10. 10.14² =
  11. 11.19² =
  12. 12.12² =
  13. 13.11² =
  14. 14.24² =
  15. 15.15² =
  16. 16.26² =
  17. 17.24² =
  18. 18.25² =
  19. 19.19² =
  20. 20.29² =
  21. 21.25² =
  22. 22.27² =
  23. 23.22² =
  24. 24.25² =
  25. 25.22² =
  26. 26.21² =
  27. 27.22² =
  28. 28.27² =
  29. 29.11² =
  30. 30.11² =
  31. 31.12² =
  32. 32.23² =
  33. 33.28² =
  34. 34.17² =
  35. 35.13² =
  36. 36.29² =
  37. 37.28² =
  38. 38.12² =
  39. 39.21² =
  40. 40.15² =

Answer key

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

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