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Mathematics
Cheerio
5 December, 07:38
Adding and subtracting denominators
6/7 + 1/3
+5
Answers (
1
)
Eleanor Higgins
5 December, 11:22
0
First you need to make both denominators the same number.
The number we can use is 21.
6/7 : to make the denominator 21, you need to multiply the numerator and the denominator by 3.
6 * 3 = 18
7 * 3 = 21
The equivalent is 18/21
1/3 : to make the denominator 21, you need to multiply the numerator and the denominator by 7.
1 * 7 = 7
3 * 7 = 21
The equivalent is 7/21
18/21 + 7/21 = 25/21 = 1 4/21
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