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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 951 · 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. 1.22² =
  2. 2.15² =
  3. 3.16² =
  4. 4.14² =
  5. 5.25² =
  6. 6.21² =
  7. 7.19² =
  8. 8.27² =
  9. 9.28² =
  10. 10.17² =
  11. 11.11² =
  12. 12.12² =
  13. 13.18² =
  14. 14.24² =
  15. 15.29² =
  16. 16.13² =
  17. 17.26² =
  18. 18.21² =
  19. 19.23² =
  20. 20.14² =
  21. 21.17² =
  22. 22.16² =
  23. 23.14² =
  24. 24.14² =
  25. 25.21² =
  26. 26.19² =
  27. 27.23² =
  28. 28.28² =
  29. 29.24² =
  30. 30.24² =
  31. 31.12² =
  32. 32.14² =
  33. 33.14² =
  34. 34.24² =
  35. 35.19² =
  36. 36.14² =
  37. 37.19² =
  38. 38.12² =
  39. 39.18² =
  40. 40.14² =

Answer key

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

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