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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 178 · 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. 1.25² =
  2. 2.24² =
  3. 3.12² =
  4. 4.15² =
  5. 5.18² =
  6. 6.17² =
  7. 7.16² =
  8. 8.11² =
  9. 9.21² =
  10. 10.19² =
  11. 11.28² =
  12. 12.26² =
  13. 13.23² =
  14. 14.29² =
  15. 15.27² =
  16. 16.14² =
  17. 17.22² =
  18. 18.19² =
  19. 19.13² =
  20. 20.23² =
  21. 21.11² =
  22. 22.19² =
  23. 23.15² =
  24. 24.28² =
  25. 25.19² =
  26. 26.27² =
  27. 27.24² =
  28. 28.19² =
  29. 29.27² =
  30. 30.25² =
  31. 31.13² =
  32. 32.21² =
  33. 33.24² =
  34. 34.22² =
  35. 35.24² =
  36. 36.27² =
  37. 37.29² =
  38. 38.12² =
  39. 39.26² =
  40. 40.16² =

Answer key

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

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