1. а) 5/9=0.(5)
б)13/99=0.(13)
2. 0,(6)=6/9 = 2/33. L=2*3,14*12=75,36 (см)
S=3,14*12*12=452,16 (см)4.
3,5х-2,8=1,4х+1,43.5х-1.4х=1.4+2.82.1х=4.2х=2
1. а) 5/9=0.(5)
б)13/99=0.(13)
2. 0,(6)=6/9 = 2/3
3. L=2*3,14*12=75,36 (см)
S=3,14*12*12=452,16 (см)
4.
3,5х-2,8=1,4х+1,4
3.5х-1.4х=1.4+2.8
2.1х=4.2
х=2