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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 999 · 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. 1.28² =
  2. 2.22² =
  3. 3.21² =
  4. 4.17² =
  5. 5.11² =
  6. 6.24² =
  7. 7.15² =
  8. 8.23² =
  9. 9.19² =
  10. 10.14² =
  11. 11.13² =
  12. 12.27² =
  13. 13.29² =
  14. 14.26² =
  15. 15.25² =
  16. 16.18² =
  17. 17.16² =
  18. 18.17² =
  19. 19.12² =
  20. 20.13² =
  21. 21.11² =
  22. 22.18² =
  23. 23.27² =
  24. 24.16² =
  25. 25.21² =
  26. 26.18² =
  27. 27.22² =
  28. 28.28² =
  29. 29.27² =
  30. 30.21² =
  31. 31.17² =
  32. 32.15² =
  33. 33.18² =
  34. 34.28² =
  35. 35.19² =
  36. 36.11² =
  37. 37.26² =
  38. 38.21² =
  39. 39.19² =
  40. 40.21² =

Answer key

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

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