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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 394 · 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. 1.19² =
  2. 2.28² =
  3. 3.13² =
  4. 4.15² =
  5. 5.21² =
  6. 6.12² =
  7. 7.11² =
  8. 8.25² =
  9. 9.23² =
  10. 10.24² =
  11. 11.14² =
  12. 12.27² =
  13. 13.16² =
  14. 14.22² =
  15. 15.18² =
  16. 16.17² =
  17. 17.29² =
  18. 18.19² =
  19. 19.25² =
  20. 20.28² =
  21. 21.13² =
  22. 22.18² =
  23. 23.24² =
  24. 24.26² =
  25. 25.25² =
  26. 26.22² =
  27. 27.25² =
  28. 28.12² =
  29. 29.19² =
  30. 30.28² =
  31. 31.27² =
  32. 32.29² =
  33. 33.26² =
  34. 34.13² =
  35. 35.15² =
  36. 36.11² =
  37. 37.28² =
  38. 38.23² =
  39. 39.28² =
  40. 40.15² =

Answer key

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

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