81000÷90=900
150000÷300=500
270000:30=9000
40000÷50=800
100:19≈5,26
н=5
----------------------------------------------
1)80120 / 90 =890,2.
<span>2)267040 / 50 =5520,8.</span>
<span>3)102560 / 60 =1709,3.</span>
4)392000 / 300=1306,6.
5)400060 / 800=500,075.
<span>6) 5608200 / 400=14020,5.</span>
S10=(a1+a10)/2*10=(3+17)/2*10=100