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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 727 · 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. 1.23² =
  2. 2.12² =
  3. 3.21² =
  4. 4.26² =
  5. 5.11² =
  6. 6.19² =
  7. 7.13² =
  8. 8.27² =
  9. 9.14² =
  10. 10.28² =
  11. 11.17² =
  12. 12.22² =
  13. 13.18² =
  14. 14.29² =
  15. 15.15² =
  16. 16.25² =
  17. 17.24² =
  18. 18.27² =
  19. 19.27² =
  20. 20.16² =
  21. 21.12² =
  22. 22.13² =
  23. 23.24² =
  24. 24.27² =
  25. 25.13² =
  26. 26.11² =
  27. 27.22² =
  28. 28.21² =
  29. 29.25² =
  30. 30.25² =
  31. 31.17² =
  32. 32.24² =
  33. 33.19² =
  34. 34.12² =
  35. 35.11² =
  36. 36.27² =
  37. 37.23² =
  38. 38.24² =
  39. 39.23² =
  40. 40.28² =

Answer key

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

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