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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 651 · 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. 1.26² =
  2. 2.16² =
  3. 3.19² =
  4. 4.17² =
  5. 5.22² =
  6. 6.27² =
  7. 7.14² =
  8. 8.28² =
  9. 9.18² =
  10. 10.23² =
  11. 11.11² =
  12. 12.13² =
  13. 13.21² =
  14. 14.24² =
  15. 15.23² =
  16. 16.29² =
  17. 17.15² =
  18. 18.12² =
  19. 19.25² =
  20. 20.14² =
  21. 21.12² =
  22. 22.27² =
  23. 23.22² =
  24. 24.16² =
  25. 25.17² =
  26. 26.21² =
  27. 27.17² =
  28. 28.19² =
  29. 29.18² =
  30. 30.13² =
  31. 31.18² =
  32. 32.29² =
  33. 33.27² =
  34. 34.29² =
  35. 35.21² =
  36. 36.19² =
  37. 37.27² =
  38. 38.27² =
  39. 39.14² =
  40. 40.21² =

Answer key

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

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