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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 183 · 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. 2.15² =
  3. 3.26² =
  4. 4.13² =
  5. 5.27² =
  6. 6.17² =
  7. 7.21² =
  8. 8.29² =
  9. 9.23² =
  10. 10.11² =
  11. 11.25² =
  12. 12.24² =
  13. 13.19² =
  14. 14.16² =
  15. 15.18² =
  16. 16.28² =
  17. 17.14² =
  18. 18.28² =
  19. 19.27² =
  20. 20.22² =
  21. 21.22² =
  22. 22.26² =
  23. 23.21² =
  24. 24.16² =
  25. 25.21² =
  26. 26.17² =
  27. 27.26² =
  28. 28.15² =
  29. 29.28² =
  30. 30.21² =
  31. 31.19² =
  32. 32.11² =
  33. 33.18² =
  34. 34.23² =
  35. 35.15² =
  36. 36.24² =
  37. 37.22² =
  38. 38.18² =
  39. 39.22² =
  40. 40.21² =

Answer key

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

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