(5 / 6-2 / 3) * 9 / 10 simple calculation Simple calculation of 1 / 5 * 8 △ 4 / 5 and (5 / 8 + 5 / 6) * 4 / 25 and 1-7 / 9 △ 7 / 8

(5 / 6-2 / 3) * 9 / 10 simple calculation Simple calculation of 1 / 5 * 8 △ 4 / 5 and (5 / 8 + 5 / 6) * 4 / 25 and 1-7 / 9 △ 7 / 8

The first problem turns division into multiplication, and then fraction into its reciprocal
The second question will be divided into brackets open, you can simplify
The third problem turns division into multiplication, and then fraction into its reciprocal