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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 913 · 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. 1.19² =
  2. 2.29² =
  3. 3.22² =
  4. 4.15² =
  5. 5.21² =
  6. 6.23² =
  7. 7.12² =
  8. 8.13² =
  9. 9.28² =
  10. 10.11² =
  11. 11.14² =
  12. 12.27² =
  13. 13.26² =
  14. 14.25² =
  15. 15.17² =
  16. 16.24² =
  17. 17.18² =
  18. 18.16² =
  19. 19.15² =
  20. 20.16² =
  21. 21.19² =
  22. 22.23² =
  23. 23.23² =
  24. 24.23² =
  25. 25.28² =
  26. 26.17² =
  27. 27.19² =
  28. 28.11² =
  29. 29.16² =
  30. 30.16² =
  31. 31.24² =
  32. 32.14² =
  33. 33.25² =
  34. 34.23² =
  35. 35.22² =
  36. 36.18² =
  37. 37.22² =
  38. 38.24² =
  39. 39.11² =
  40. 40.13² =

Answer key

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

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