2856:40=71,6
71,6 * 40 =2856
<span>19217:30 =63,9
</span>63,9 * 30 =19217
<span>81569:500 =163,138
</span>163,138*500 =81569
1. |3.5-8|=|-4,5|=4,5
|8-3.5|=|4,5|=4,5
|3.5-8|= |8-3.5|
2. |4.4| + |-1.7|=4,4+1,7=6,1
|4.4|-|1.7|=4,4-1,7=2,7
6,1>2,7
|4.4| + |-1.7|> |4.4|-|1.7|
3. |7а-12а| =|-5a|
|12а-7а|=|5a|
|-5a|=|5a|
|7а-12а|= |12а-7а|
24 * 3/8= 3*3=9 мальчиков