S_9=9*4,7=42,3S_8:8=4,9 => S_8=8*4,9=39,2 S_9-S_8=42,3-39,2=3,1" alt="S_9:9=4,7 => S_9=9*4,7=42,3S_8:8=4,9 => S_8=8*4,9=39,2 S_9-S_8=42,3-39,2=3,1"
ответ: 3,1
S_9=9*4,7=42,3S_8:8=4,9 => S_8=8*4,9=39,2 S_9-S_8=42,3-39,2=3,1" alt="S_9:9=4,7 => S_9=9*4,7=42,3S_8:8=4,9 => S_8=8*4,9=39,2 S_9-S_8=42,3-39,2=3,1"
ответ: 3,1