ค าชี้แจง - lrp.ac.th · pdf...
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1 1
2 8 1 2 3 4 5 6 7 8 1 2
1 2
1.
2. 3. 4.
http://www.google.co.th/imgres?imgurl=http://1.bp.blogspot.com/-p2Uqaq947ak/UGkwb_ZQ7VI/AAAAAAAADHk/FrXbsFNVyt8/s1600/clipart+(2).jpg&imgrefurl=http://loadebookstogo.blogspot.com/2012/09/occupation-cartoon.html&h=927&w=821&sz=130&tbnid=M7nl1BkINKL6xM:&tbnh=90&tbnw=80&zoom=1&usg=__lgLLYktyv3S8uIK8P-oTuRFdMV0=&docid=J52bI3oxJk3hwM&hl=th&sa=X&ei=6e1_Ue3QNIrJrQfBnIGYAg&sqi=2&ved=0CC8Q9QEwAA&dur=0
1 3
1. 2. 3. 4. 1.1 1.4
5. 6.
7.
http://www.google.co.th/imgres?q=%E0%B8%81%E0%B8%B2%E0%B8%A3%E0%B9%8C%E0%B8%95%E0%B8%B9%E0%B8%99%E0%B9%84%E0%B8%97%E0%B8%A2&start=86&sa=X&hl=th&biw=1280&bih=855&tbm=isch&tbnid=CvFMiqcZ8GoQCM:&imgrefurl=http://kat555skw.blogspot.com/&docid=JRNOCPhXdufkqM&imgurl=http://jungkosusu.wikispaces.com/file/view/%E0%B8%81%E0%B8%B2%E0%B8%A3%E0%B9%8C%E0%B8%95%E0%B8%B9%E0%B8%99%E0%B9%84%E0%B8%97%E0%B8%A21.bmp&w=246&h=205&ei=7-h_UamKEI_yrQeVh4CgDQ&zoom=1&ved=1t:3588,r:9,s:100,i:31&iact=rc&dur=1700&page=4&tbnh=164&tbnw=196&ndsp=34&tx=104&ty=68
1 4
1. 2. 3.
(Ratio)
a b a : b a
b a b
a b
1 5
1
1. 4 10 15 2.
() 3.
1. 4 100 . 100 : 4 . 400 : 1 . 4 : 100 . 1 : 100
2. 110 1 . 1 : 110 . 1 : 60 . 110 : 12 . 110 : 60
3. 120 7
. 7 : 120 . 113 : 120 . 120 : 7 . 120 : 113
1 6
4. 2 23 . 2 : 23 . 2 : 25
. 23 : 3 . 23 : 25
5. . 3 : 6 . 6 : 3 . 3 : 4 . 4 : 3
6. 2,550 3,000 . 3,000 : 2,550 . 3,000 : 450 . 2,550 : 3,000 . 2,550 : 450
7. 25
. 12 : 25 . 6 : 25 . 5 : 25 . 1 : 25
8. 10 7 . 3 : 7 . 3 : 10 . 7 : 1 . 10 : 3
1 7
9. 1 260
. 1 : 260 . 1 : 36 . 250 : 36 . 260 : 1
10 . 6 24 1 . 1 : 24 . 1 : 4
. 4 : 1 . 6 : 24
1 8
1
(Ratio)
a b a : b a
b a b a
b a : b a b a b a : b b : a 3 : 100 100 : 3 3 : 100 3 100 100 : 3 100 3
1 9
11
2
1. 3 2 3 : 2 3
2 ( )
2. 2 3 2 : 3 2
3 ( )
22
5 4 5 4 5 : 4
4
5
33
3 10 3 : 10 3
10
44
90 1 : 90
1
90
30 : 90 30
90
1 10
55
8 3 8 3 8 : 3
3
8
66
9 12 9 : 12
12
9
12 4 12 : 4
4
12
9 25 9 : 25
25
9
1 11
1. 5 75 5 75 5 : 75 2. 3 45 3 45 3 : 45 3. 3 90 3 90 3 : 90
4. 85 1 85 12 85
1 : 85 12 : 85
5. 13 1 13 1 : 13 6. 80
80 1 80 : 1
80 : 60 7. 3 100 3 100 : 3 8. 3 25 3 25 3 : 25 9. 3 750 3 750 3 : 750 10. 15 1 15 1 : 15
1 12
1.1
1 ( 1 )
200
1 : 200 1200
1.
2.
3.
4.
5.
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