Решите...........................1ое

Question

Решите...........................1ое

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Answer 1

- 1/4+( -3/4) - 2/9 +(- 2/3)=1 - 2/9+ 4/9=7/9+ 4/9=11/9= 1 2/9
- 1/4 3/4=4/4 = 1    1- 2/9=9/9 - 2/9=7/9
2/3 в квадрате=4/9