2 7/30+3 9/20- 4 59/60

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вопрос

To add and subtract these mixed fractions, we need to convert them to improper fractions first.

2 7/30 = (2 30 + 7) / 30 = 67 / 30
3 9/20 = (3 20 + 9) / 20 = 69 / 20
4 59/60 = (4 * 60 + 59) / 60 = 299 / 60

Now we can perform the operation:

67 / 30 + 69 / 20 - 299 / 60

To add and subtract fractions, we need to find a common denominator, which in this case is 60.

(67 2) / (30 2) + (69 3) / (20 3) - 299 / 60
= 134 / 60 + 207 / 60 - 299 / 60
= (134 + 207 - 299) / 60
= 42 / 60
= 7 / 10

So, 2 7/30 + 3 9/20 - 4 59/60 = 7/10.