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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 983 · 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. 1.11² =
  2. 2.15² =
  3. 3.21² =
  4. 4.17² =
  5. 5.22² =
  6. 6.26² =
  7. 7.29² =
  8. 8.27² =
  9. 9.12² =
  10. 10.13² =
  11. 11.18² =
  12. 12.23² =
  13. 13.14² =
  14. 14.28² =
  15. 15.16² =
  16. 16.25² =
  17. 17.18² =
  18. 18.19² =
  19. 19.24² =
  20. 20.19² =
  21. 21.24² =
  22. 22.28² =
  23. 23.26² =
  24. 24.25² =
  25. 25.28² =
  26. 26.13² =
  27. 27.27² =
  28. 28.22² =
  29. 29.12² =
  30. 30.11² =
  31. 31.18² =
  32. 32.13² =
  33. 33.11² =
  34. 34.28² =
  35. 35.16² =
  36. 36.21² =
  37. 37.22² =
  38. 38.29² =
  39. 39.25² =
  40. 40.13² =

Answer key

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

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