Mr Han had a 620 m long fince.his fince was 279 m longger than Mr chang's fince.what was the total lenght of fences altogether?

Pelajaran    :Matematika
Kelas          :7
Bab             :1
Nama Bab  :Bilangan Bulat
Kode mapel:2
Kode           :7.2.1

Jawab:

        Mr han=Mr chang+279m
620m-279m=Mr chang
     Mr chang=341m

Mr han+Mr chang=620m+341m
                            =961m

han = x 
chnag = y

x =y+279 = 620 

y+279 = 620 
          y=620-279 
            =341 m

total lenght = 620 + 341 = 961 m