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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 945 · 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. 1.15² =
  2. 2.22² =
  3. 3.19² =
  4. 4.28² =
  5. 5.17² =
  6. 6.27² =
  7. 7.26² =
  8. 8.11² =
  9. 9.18² =
  10. 10.21² =
  11. 11.24² =
  12. 12.13² =
  13. 13.25² =
  14. 14.14² =
  15. 15.12² =
  16. 16.16² =
  17. 17.29² =
  18. 18.21² =
  19. 19.23² =
  20. 20.23² =
  21. 21.14² =
  22. 22.18² =
  23. 23.27² =
  24. 24.14² =
  25. 25.13² =
  26. 26.16² =
  27. 27.24² =
  28. 28.18² =
  29. 29.14² =
  30. 30.12² =
  31. 31.23² =
  32. 32.24² =
  33. 33.14² =
  34. 34.15² =
  35. 35.25² =
  36. 36.13² =
  37. 37.14² =
  38. 38.17² =
  39. 39.14² =
  40. 40.16² =

Answer key

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

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