Vom efectua calculele:
a)
1,(3) - 0,75=
Transformam in fractii ordinare:
[tex]\frac{13-1}{9}-\frac{75}{100} =\frac{4}{3}-\frac{3}{4} =\frac{7}{12}=0,58(3)[/tex]
c)
10,8-1,6=9,2
10,8×1,6=
[tex]\frac{108}{10}\times \frac{16}{10}= \frac{1728}{10}=172,8[/tex]
10,8+1,6=12,4
10,8:1,6=6,75
d)
0,41(6):1,2=
Transformam in fractii ordinare:
[tex]\frac{416-41}{900}:\frac{12}{10}[/tex]
Transformam in inmultire prin rasturnarea celei de-a doua fractii
[tex]\frac{375}{900}\times \frac{10}{12}=\frac{375}{90}\times\frac{1}{12} =\frac{25}{6}\times\frac{1}{12}=\frac{25}{72}= 0,347(2)[/tex]