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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 971 · 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. 1.13² =
  2. 2.29² =
  3. 3.27² =
  4. 4.22² =
  5. 5.26² =
  6. 6.14² =
  7. 7.25² =
  8. 8.15² =
  9. 9.16² =
  10. 10.11² =
  11. 11.24² =
  12. 12.21² =
  13. 13.19² =
  14. 14.12² =
  15. 15.15² =
  16. 16.28² =
  17. 17.17² =
  18. 18.24² =
  19. 19.18² =
  20. 20.28² =
  21. 21.23² =
  22. 22.27² =
  23. 23.19² =
  24. 24.25² =
  25. 25.27² =
  26. 26.14² =
  27. 27.14² =
  28. 28.23² =
  29. 29.14² =
  30. 30.21² =
  31. 31.27² =
  32. 32.15² =
  33. 33.24² =
  34. 34.21² =
  35. 35.11² =
  36. 36.21² =
  37. 37.21² =
  38. 38.21² =
  39. 39.16² =
  40. 40.24² =

Answer key

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

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