2,569 -(1 - 0,15)+ 0,286 +(13,09 - 0,574)=29,992
1. (1 -0,15)= 0,85
2. (13,09 - 0,574) = 12,516
3. 2,569 - 0,85 = 17,19
4. 17,19 + 0,286 = 17,476
5. 17,476 + 12,516 = 29,992
12/13,13/14, 14/15 и т.д.
36х+28-26=48
36х=46
х=46/36=23/18=1и5/18
8м2=800дм2
2м2=20000см2
5дм2=500см2
850см2=8дм2,50см2
1768см2=10дм2,768см2
9860см2=90дм2,860см2
40м2=4000дм2
1000дм2=10м2
105дм2=1м2,5дм2