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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 155 · 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. 2.23² =
  3. 3.19² =
  4. 4.11² =
  5. 5.28² =
  6. 6.16² =
  7. 7.21² =
  8. 8.24² =
  9. 9.15² =
  10. 10.27² =
  11. 11.12² =
  12. 12.29² =
  13. 13.22² =
  14. 14.14² =
  15. 15.17² =
  16. 16.25² =
  17. 17.18² =
  18. 18.16² =
  19. 19.28² =
  20. 20.13² =
  21. 21.23² =
  22. 22.15² =
  23. 23.11² =
  24. 24.12² =
  25. 25.18² =
  26. 26.13² =
  27. 27.24² =
  28. 28.12² =
  29. 29.14² =
  30. 30.27² =
  31. 31.24² =
  32. 32.27² =
  33. 33.25² =
  34. 34.13² =
  35. 35.24² =
  36. 36.21² =
  37. 37.19² =
  38. 38.17² =
  39. 39.24² =
  40. 40.25² =

Answer key

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

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