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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 928 · 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. 1.25² =
  2. 2.19² =
  3. 3.26² =
  4. 4.24² =
  5. 5.22² =
  6. 6.28² =
  7. 7.14² =
  8. 8.18² =
  9. 9.27² =
  10. 10.29² =
  11. 11.21² =
  12. 12.17² =
  13. 13.11² =
  14. 14.15² =
  15. 15.12² =
  16. 16.13² =
  17. 17.16² =
  18. 18.19² =
  19. 19.23² =
  20. 20.12² =
  21. 21.14² =
  22. 22.25² =
  23. 23.24² =
  24. 24.17² =
  25. 25.12² =
  26. 26.17² =
  27. 27.26² =
  28. 28.21² =
  29. 29.27² =
  30. 30.18² =
  31. 31.15² =
  32. 32.27² =
  33. 33.24² =
  34. 34.19² =
  35. 35.14² =
  36. 36.21² =
  37. 37.13² =
  38. 38.23² =
  39. 39.24² =
  40. 40.11² =

Answer key

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

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