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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 995 · 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. 2.24² =
  3. 3.11² =
  4. 4.21² =
  5. 5.25² =
  6. 6.12² =
  7. 7.15² =
  8. 8.29² =
  9. 9.22² =
  10. 10.14² =
  11. 11.18² =
  12. 12.27² =
  13. 13.28² =
  14. 14.19² =
  15. 15.16² =
  16. 16.26² =
  17. 17.17² =
  18. 18.24² =
  19. 19.17² =
  20. 20.23² =
  21. 21.14² =
  22. 22.15² =
  23. 23.22² =
  24. 24.27² =
  25. 25.12² =
  26. 26.29² =
  27. 27.24² =
  28. 28.13² =
  29. 29.19² =
  30. 30.24² =
  31. 31.11² =
  32. 32.19² =
  33. 33.27² =
  34. 34.21² =
  35. 35.26² =
  36. 36.18² =
  37. 37.13² =
  38. 38.25² =
  39. 39.12² =
  40. 40.22² =

Answer key

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

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