Сократить дробь 21/7=5 ktvhorojvojjovttpjvtkov
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ktvhorojvojjovttpjvtkov
vtitihvjotvjptgpkgttkgp
ktvhorojvojjovttpjvtkov
vtitihvjotvjptgpkgttkgp
ktvhorojvojjovttpjvtkov
vtitihvjotvjptgpkgttkgp
ktvhorojvojjovttpjvtkov
vtitihvjotvjptgpkgttkgp
ktvhorojvojjovttpjvtkov
vtitihvjotvjptgpkgttkgp
ktvhorojvojjovttpjvtkov
vtitihvjotvjptgpkgttkgp
ktvhorojvojjovttpjvtkov
vtitihvjotvjptgpkgttkgp
ktvhorojvojjovttpjvtkov
vtitihvjotvjptgpkgttkgp
ktvhorojvojjovttpjvtkov
vtitihvjotvjptgpkgttkgp
ktvhorojvojjovttpjvtkov
vtitihvjotvjptgpkgttkgp
ktvhorojvojjovttpjvtkov
vtitihvjotvjptgpkgttkgp
ktvhorojvojjovttpjvtkov
vtitihvjotvjptgpkgttkgp
ktvhorojvojjovttpjvtkov
vtitihvjotvjptgpkgttkgp
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vtitihvjotvjptgpkgttkgp
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Ответы на вопрос:
1) ( 30+1 ) ( 30-1 ) = 30² - 1² = 900 - 1 = 899 2 ) 61 * 59 = ( 60 + 1 ) ( 60 - 1 ) = 3600-1 = 3599 3 ) 199 * 201 = ( 200 + 1 ) ( 200 - 1 ) = 40000 - 1 = 39999 4 ) 72 * 68 = ( 70 + 2 ) ( 70 - 2 ) = 4900 - 4 = 4896 5 ) 55² - 45²= ( 55 - 45 ) ( 55 + 45 ) = 3025 - 2025 = 1000 6 ) 41² - 31² = ( 41 - 31 ) ( 41 + 31 ) = 1681 - 961 = 720 7 ) 76² - 24² = ( 76 - 24 ) (76 + 24 ) = 5776 - 576 = 5200 8 ) 37² - 23² = ( 37 - 23 ) ( 37 + 23 ) = 1369 - 529 = 840
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