Quy đồng mẫu các phân số sau:

Report
Question

Please briefly explain why you feel this question should be reported.

Report
Cancel

Quy đồng mẫu các phân số sau:

Answers ( 1 )

  1. Please briefly explain why you feel this answer should be reported.

    Report
    Cancel

    `Phạm` `Kim` `Ngọc“:3`

    a) Ta có: `17/20=(17xx3)/(20xx3)=51/60`

              `13/15=(13xx4)/(15xx4)=52/60`

    b) Ta có: `25/75=1/3=4/12`

              `17/34=1/2=6/12`

              `121/132=11/12`

    c) Ta có: `9/-30=-3/10=-60/200`

              `98/80=49/40=245/200`

              `(-15)/-1000=15/1000=3/200`

    ———–

    `(-A)/(-B)=A/B`

Leave an answer

Browse

By answering, you agree to the Terms of Service and Privacy Policy.