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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 891 · 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. 1.14² =
  2. 2.16² =
  3. 3.18² =
  4. 4.21² =
  5. 5.23² =
  6. 6.22² =
  7. 7.15² =
  8. 8.26² =
  9. 9.28² =
  10. 10.27² =
  11. 11.12² =
  12. 12.13² =
  13. 13.29² =
  14. 14.19² =
  15. 15.11² =
  16. 16.24² =
  17. 17.25² =
  18. 18.17² =
  19. 19.21² =
  20. 20.29² =
  21. 21.19² =
  22. 22.16² =
  23. 23.18² =
  24. 24.14² =
  25. 25.23² =
  26. 26.19² =
  27. 27.23² =
  28. 28.22² =
  29. 29.27² =
  30. 30.12² =
  31. 31.16² =
  32. 32.21² =
  33. 33.24² =
  34. 34.25² =
  35. 35.19² =
  36. 36.13² =
  37. 37.13² =
  38. 38.14² =
  39. 39.19² =
  40. 40.13² =

Answer key

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

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