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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 930 · 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. 2.25² =
  3. 3.22² =
  4. 4.23² =
  5. 5.29² =
  6. 6.12² =
  7. 7.26² =
  8. 8.13² =
  9. 9.24² =
  10. 10.28² =
  11. 11.11² =
  12. 12.17² =
  13. 13.27² =
  14. 14.21² =
  15. 15.16² =
  16. 16.14² =
  17. 17.15² =
  18. 18.16² =
  19. 19.18² =
  20. 20.29² =
  21. 21.11² =
  22. 22.13² =
  23. 23.24² =
  24. 24.16² =
  25. 25.11² =
  26. 26.23² =
  27. 27.18² =
  28. 28.17² =
  29. 29.19² =
  30. 30.11² =
  31. 31.24² =
  32. 32.23² =
  33. 33.22² =
  34. 34.24² =
  35. 35.24² =
  36. 36.17² =
  37. 37.12² =
  38. 38.18² =
  39. 39.19² =
  40. 40.24² =

Answer key

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

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