2 1/5+2/5=2 3/5
5/8+3 1/8=3 3/4
4 13/45+4/45=4 17/45
1 1/7+5 5/7=6 6/7
9 3/8 + 7 1/8=16 1/2
3 1/2 + 1 1/2=5
8 2/9 + 4 7/9=13
5 3/5 + 1 3/5=7 1/5
<span>9 5/9 + 11 7/9=21 1/3</span>
1 ).((28,3+х)-17,4)+6,7=21,6 2).101,3-(97,8-(х-4,3))=23,72 3).91-(112,41-(х+5,5))=13,91 4).101,2-(73,2+(х-4,3))=22,66 Решите ура
пумба
1) ((28,3+х)-17,4)+6.7=21.6
((28,3+х)-17,4)=21.7-6.7
<span>(28,3+х)-17,4=14.9
</span>(28,3+х)=14.9+17.4
28,3+х=32.3
х=32.3-28.3
х=4
2)<span>101,3-(97,8-(х-4,3))=23,72
</span>(97,8-(х-4,3))=101,3-23,72
97,8-(х-4,3)=77.58
х-4,3=97,8-77.58
х-4,3=20.22
х=20.22+4.3
х=24.52
3)<span>91-(112,41-(х+5,5))=13,91
</span>(112,41-(х+5,5))=91-13.91
112,41-(х+5,5)=77.09
(х+5,5)=112,41-77.09
х+5,5=35.32
х=35.32-5.5
х=29.82
4)<span>101,2-(73,2+(х-4,3))=22,66
</span>(73,2+(х-4,3))=101,2-22,66
73,2+(х-4,3)=78.54
х-4,3=78.54-73,2
х-4,3=5.34
х=5.34+4.3
х=9.64 :)))))