1) 279 - 13 = 259 - 13 = 25 - 3 • 19 = 229 =
2 4/9
2) 345 - 23 = 195 - 23 = 3 • 19 - 5 • 215 = 4715 = 3215
3)) 456 - 213 = 296 - 73 = 29 - 2 • 76 = 156 = 5 • 32 • 3 = 212
4)645 - 238 = 345 - 198 = 8 • 34 - 5 • 1940 = 17740 = 41740
5)912 - 438 = 192 - 358 = 4 • 19 - 358 = 418 = 518
6)81920 - 5710 = 17920 - 5710 = 179 - 2 • 5720 = 6520 = 13 • 54 • 5 = 314
вот тебе с решением