a) 1/3 + 2/15 + 3/5 b) 2/3 + 5/18 + 7/9
2 câu trả lời
Đáp án + Giải thích các bước giải:
`a) 1/3 + 2/15 + 3/5`
`= 5/15 + 2/15 + 9/15`
`= (5 + 2 + 9)/15`
`= 16/15`
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`b) 2/3 + 5/18 + 7/9`
`= 12/18 + 5/18 + 14/18`
`= (12 + 5 + 14)/18`
`= 31/18`
Đáp án:
`a)` `\frac{1}{3} + \frac{2}{15} + \frac{3}{5}`
`= \frac{5}{15} + \frac{2}{15} + \frac{9}{15}`
`= \frac{16}{15}`
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`b)` `\frac{2}{3} + \frac{5}{18} + \frac{7}{9}`
`= \frac{12}{18} + \frac{5}{18} + \frac{14}{18}`
`= \frac{31}{18}`