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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 359 · 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. 1.12² =
  2. 2.11² =
  3. 3.25² =
  4. 4.16² =
  5. 5.23² =
  6. 6.29² =
  7. 7.21² =
  8. 8.13² =
  9. 9.24² =
  10. 10.22² =
  11. 11.26² =
  12. 12.19² =
  13. 13.27² =
  14. 14.15² =
  15. 15.12² =
  16. 16.17² =
  17. 17.14² =
  18. 18.18² =
  19. 19.28² =
  20. 20.15² =
  21. 21.25² =
  22. 22.25² =
  23. 23.14² =
  24. 24.25² =
  25. 25.27² =
  26. 26.14² =
  27. 27.25² =
  28. 28.13² =
  29. 29.25² =
  30. 30.26² =
  31. 31.14² =
  32. 32.26² =
  33. 33.22² =
  34. 34.11² =
  35. 35.27² =
  36. 36.14² =
  37. 37.27² =
  38. 38.16² =
  39. 39.29² =
  40. 40.29² =

Answer key

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

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