✔ 最佳答案
1.a:b=3:2,而b:c=2:9,求a:b:c
a:b:c = 3:2:9
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2.a:b=7:3,而b:c=4:2,求a:b:c
a:b = 7:3
= 7x4:3x4
= 28: 12
b:c =4:2
= 4x3:2x3
= 12: 6
a:b:c= 28:12:6
= 14:6:3
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3.a和b以5:3去分$560,問每人會得多少?
a 會得到 : 560 x 5/3+5
= 560 x 5/8
= $350
b 會得到 : 560 - 350
= $210
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希望幫到妳喇:)