<span>0=0</span>
<span><span>10−10</span>=<span>15−15</span></span>
<span><span><span>10−6</span>−4</span>=<span><span>15−9</span>−6</span></span>
<span><span>2<span>(<span><span>5−3</span>−2</span>)</span></span>=<span>3<span>(<span><span>5−3</span>−2</span>)</span></span></span>
<span>2=3</span>
<span><span>2+2</span>=<span>3+2</span></span>
<span><span>2+2</span>=<span>5</span></span>
Ответ:
Пошаговое объяснение:
-2/9+(2/9-3/4) = -2/9 + 2/9 - 3/4 = -3/4
4/7-(5/11-3/7) = 4/7 - 5/11 + 3/7 = 1 - 5/11 = 6/11
3 5/6+(-5/6-1/7) = 3 5/6 - 5/6 - 1/7 = 3 - 1/7 = 2 6/7
3/8-(1/9-5/8) = 3/8 - 1/9 + 5/8 = 1 - 1/9 = 8/9