8 6/25 - 3 4/5 = 8 6/25 - 3 20/25 = 4 11/25
<span>(365+124)+108=597
365+124=489
489+108=597
(91-63)+396=424
91-63=28
28+396=424
73+(418+418)=909
418+418=836
73+836=909
277+(100-19)</span>=358
100-19=81
277+81=358
1)=113/9-43/6=(678-387)/54=291/54=5,38
2)=29/4-52/15=(435-208)/60=227/60=3,78
3)=113/12-44/7=(791-525)/84=263/84=3,130
4)=25/6-46/21=(525-276)/126=249/126=1,97