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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 979 · 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. 1.13² =
  2. 2.19² =
  3. 3.23² =
  4. 4.11² =
  5. 5.29² =
  6. 6.12² =
  7. 7.24² =
  8. 8.21² =
  9. 9.15² =
  10. 10.28² =
  11. 11.14² =
  12. 12.27² =
  13. 13.25² =
  14. 14.26² =
  15. 15.16² =
  16. 16.17² =
  17. 17.18² =
  18. 18.22² =
  19. 19.14² =
  20. 20.11² =
  21. 21.17² =
  22. 22.23² =
  23. 23.17² =
  24. 24.22² =
  25. 25.12² =
  26. 26.14² =
  27. 27.16² =
  28. 28.25² =
  29. 29.17² =
  30. 30.27² =
  31. 31.28² =
  32. 32.17² =
  33. 33.18² =
  34. 34.14² =
  35. 35.13² =
  36. 36.15² =
  37. 37.19² =
  38. 38.12² =
  39. 39.28² =
  40. 40.21² =

Answer key

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

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