־
1.	Ҳ
3ˡ1ͳ1ˡÿ101ˡÿ2001  10007ͳ20   3+7+2+5=17
	ӣǱӳ2ˡԪ˧2ˡ5
	
2.Ǳפ20+ٶ/10 פ40+ٶ/5Ǳ20-30 40-60 ޲Żפ
3.սģΪ5-25

