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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 946 · 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. 1.18² =
  2. 2.25² =
  3. 3.14² =
  4. 4.16² =
  5. 5.15² =
  6. 6.28² =
  7. 7.21² =
  8. 8.27² =
  9. 9.26² =
  10. 10.17² =
  11. 11.11² =
  12. 12.13² =
  13. 13.24² =
  14. 14.12² =
  15. 15.22² =
  16. 16.29² =
  17. 17.27² =
  18. 18.19² =
  19. 19.23² =
  20. 20.12² =
  21. 21.26² =
  22. 22.17² =
  23. 23.22² =
  24. 24.27² =
  25. 25.21² =
  26. 26.27² =
  27. 27.14² =
  28. 28.21² =
  29. 29.25² =
  30. 30.16² =
  31. 31.27² =
  32. 32.24² =
  33. 33.28² =
  34. 34.19² =
  35. 35.12² =
  36. 36.21² =
  37. 37.21² =
  38. 38.23² =
  39. 39.16² =
  40. 40.27² =

Answer key

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

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