อัตราส่วนและร้อยละ
DESCRIPTION
ration and percentTRANSCRIPT
1
1
.2
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1.1.9 + x : 7 + x = 5 : 4
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1.2. : = 1 : 5
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2. 2 : 3 7 3 : 4
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3
.2
-------------------------------------------------- ------------------------------------------------------------ -----1., 10 8
12 120,000
1.1.
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1.2. 48,000 ...................................................................................................................................................
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...................................................................................................................................................2. 40,000 2 20,000 4 40,000 100,000
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2.2. 6
100,000
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...................................................................................................................................................3. 20 % 100
24,600 1
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................................................................................................................................................... 4 .2 -------------------------------------------------- ------------------------------------------------------------ -----1. 18,000 15,000
16,000
60,000
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...................................................................................................................................................2. 160 125
153
20
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...................................................................................................................................................3. 1
2 8 1
2 5 : 7
30
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2
.2 -------------------------------------------------- ------------------------------------------------------------ -----1. x : y
1.1. 4(2x - y) = 3(2y + x)
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1.5.
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2. x : y = 4 : 7 2x + 5y : 3y - 2x
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3. a : b = 10 : 3 2a - 5b : a - 3b
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5
.2
-------------------------------------------------- ------------------------------------------------------------ -----1. 8,540 10 % 12% 1
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2. 3 : 2 30% 30%
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3. 400 20%
25% 5%
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......................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................4. 610 125%
80%
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........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ 6
.2
-------------------------------------------------- ------------------------------------------------------------ -----1.A B 30% B C 30% A C
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...2. 60 15% 10%
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..3. 21% 15%
19% 60 15%
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... 7
.2 -------------------------------------------------- ------------------------------------------------------------ -----1.
1. 35 28
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2. 48 30
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3. 54 45
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2.
1. 1.5 42
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2. 0.6 45
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3.
1. 2.5 1 : 500,000
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2. 450 1 : 500,000
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3. 245
..4. 12 25 8
3
................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... ................................................................................................................................................... 5. 75 6.5
8 21
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6.
1.35C
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2.- 42C
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3.252F
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4.- 212F
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7. 18 926 14
879 14
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................................................................................................................................................... 1
.2 -------------------------------------------------- ------------------------------------------------------------ 1. x
1.1.9 + x : 7 + x = 5 : 4
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1.2. : = 1 : 5
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2. 2 : 3 7 3 : 4
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