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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 906 · 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. 1.17² =
  2. 2.11² =
  3. 3.12² =
  4. 4.28² =
  5. 5.18² =
  6. 6.15² =
  7. 7.27² =
  8. 8.21² =
  9. 9.25² =
  10. 10.29² =
  11. 11.23² =
  12. 12.16² =
  13. 13.19² =
  14. 14.22² =
  15. 15.14² =
  16. 16.13² =
  17. 17.26² =
  18. 18.24² =
  19. 19.18² =
  20. 20.23² =
  21. 21.18² =
  22. 22.21² =
  23. 23.29² =
  24. 24.27² =
  25. 25.17² =
  26. 26.13² =
  27. 27.25² =
  28. 28.13² =
  29. 29.18² =
  30. 30.25² =
  31. 31.25² =
  32. 32.28² =
  33. 33.23² =
  34. 34.17² =
  35. 35.18² =
  36. 36.13² =
  37. 37.18² =
  38. 38.13² =
  39. 39.19² =
  40. 40.27² =

Answer key

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

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