Question

Simplifica fractiile 30 supra 21; aa supra aaaa; ab+ba supra 22

Answer 1

30/21=10/7
aa/aaaa=10a+a/1000a+100a+10a+a=11a/1111a=11/1111=1/101
ab+ba/22=10a+b+10b+a/22=11a+11b/22=11*(a+b)/22=a+b/2

Answer 2

30/21=(30:3)/(21:3)=10/7

11a/1111a=11/1111=1/101



tinem cont ca ab=ba  numere=10a+b+10b+a=11a+11b=11(a+b)
atunci fractia este
11(a+b)/22=(a+b)/2