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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 918 · 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. 2.15² =
  3. 3.14² =
  4. 4.22² =
  5. 5.21² =
  6. 6.17² =
  7. 7.27² =
  8. 8.11² =
  9. 9.23² =
  10. 10.28² =
  11. 11.25² =
  12. 12.29² =
  13. 13.24² =
  14. 14.13² =
  15. 15.19² =
  16. 16.18² =
  17. 17.12² =
  18. 18.16² =
  19. 19.15² =
  20. 20.27² =
  21. 21.21² =
  22. 22.14² =
  23. 23.24² =
  24. 24.22² =
  25. 25.16² =
  26. 26.17² =
  27. 27.26² =
  28. 28.15² =
  29. 29.11² =
  30. 30.21² =
  31. 31.21² =
  32. 32.16² =
  33. 33.15² =
  34. 34.16² =
  35. 35.29² =
  36. 36.23² =
  37. 37.19² =
  38. 38.25² =
  39. 39.24² =
  40. 40.16² =

Answer key

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

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