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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 973 · 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. 1.26² =
  2. 2.23² =
  3. 3.21² =
  4. 4.24² =
  5. 5.27² =
  6. 6.17² =
  7. 7.11² =
  8. 8.13² =
  9. 9.22² =
  10. 10.14² =
  11. 11.15² =
  12. 12.25² =
  13. 13.18² =
  14. 14.28² =
  15. 15.29² =
  16. 16.16² =
  17. 17.12² =
  18. 18.26² =
  19. 19.19² =
  20. 20.13² =
  21. 21.21² =
  22. 22.16² =
  23. 23.25² =
  24. 24.23² =
  25. 25.18² =
  26. 26.23² =
  27. 27.12² =
  28. 28.18² =
  29. 29.14² =
  30. 30.27² =
  31. 31.22² =
  32. 32.25² =
  33. 33.22² =
  34. 34.27² =
  35. 35.27² =
  36. 36.14² =
  37. 37.13² =
  38. 38.21² =
  39. 39.19² =
  40. 40.27² =

Answer key

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

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