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Squares 1 to 30 Mental Maths Worksheet

Mental maths lesson 18: Squares up to 30 · Set 901 · 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. 1.21² =
  2. 2.25² =
  3. 3.15² =
  4. 4.14² =
  5. 5.28² =
  6. 6.13² =
  7. 7.18² =
  8. 8.12² =
  9. 9.19² =
  10. 10.24² =
  11. 11.23² =
  12. 12.26² =
  13. 13.11² =
  14. 14.17² =
  15. 15.29² =
  16. 16.27² =
  17. 17.16² =
  18. 18.28² =
  19. 19.22² =
  20. 20.24² =
  21. 21.16² =
  22. 22.16² =
  23. 23.28² =
  24. 24.14² =
  25. 25.15² =
  26. 26.24² =
  27. 27.13² =
  28. 28.25² =
  29. 29.13² =
  30. 30.27² =
  31. 31.19² =
  32. 32.16² =
  33. 33.27² =
  34. 34.21² =
  35. 35.17² =
  36. 36.14² =
  37. 37.14² =
  38. 38.11² =
  39. 39.14² =
  40. 40.11² =

Answer key

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

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