8092320. ..... .... ...... ....
49.362+51.362=100.724. 394.268+394.232=788.500. 65.829-65.729=100. 394.268+394.232=788.500. 64.258-6.439-6.419=51.400
15.1
а) [3a] - [5a] - [4a] - [32a] - [16a]
б) [7x] - [3x] - [8x] - [4x] - [8x]
в) [8m] - [24m] - [30m] - [18m] - [9m]
г) [25y] - [5y] - [7y] - [y] - [13y]
15.2
а) [15y] - [22y] - [44y] - [y] - [8y]
б) [8b] - [3b] - [12b] - [36b] - [20b]
в) [c] - [15c] - [25c] - [5c] - [6c]
<span>г) [4d] - [12d] - [24d] - [15d] - [5d]</span>
258400:85=3040 258400-258317=83 258485:85=3041 258485-258317=168 258570:85=3042 258570-258317=253