a) 1+28+2+5++4=
1+5+2+4=
7+7+4=
14+3=
17
б) 5-3.15+7=
5-3.15+7=
12-3.15=
13-3.15=
13-3=
9
в) 8-(4+2)=
8-(4+2)=
8-6=
2=
2
г) (18+3)-7=
(18+3)-7=
21-7=
14=
14
a) 1
+28+2
+5
+
+4
=
1
+5
+2![\frac{5}{12}+[tex]\frac{7}{12}](/tpl/images/1008/1251/8d811.png)
+4
=
7+7+4
=
14+3=
17
б) 5
-3.15+7
=
5
-3.15+7
=
12
-3.15=
13
-3.15=
13
-3
=
9
в) 8
-(4
+2
)=
8
-(4
+2
)=
8
-6
=
8
-6
=
2
=
2
г) (18
+3
)-7
=
(18
+3
)-7
=
21
-7
=
14
=
14