Use proportional reasoning to solve. 3/7= n/28?

👨🏻‍🏫 學術台數學

[匿名]

2016-02-26 4:01 pm

回答 (1)

賣女孩的火柴

2016-02-26 4:03 pm

3 : 7 = n : 28
28 is 4 times of 7, and thus n is 4 times of 3.

Then, n = 3 × 4 = 12

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