а) -3,4+(-1 2/9+5,07-6 7/15)-7/9-(-2,53+1 2/15-3,4)=-3,4+-1 2/9+5,07-6 7/15-7/9+2,53-1 2/15+3,4=-3
3.4-3.4=0
-1 2/9-7/9=-2
5.07+2.53=7.6
-6 7/15-1 2/15=-8 9/15=-8 3/5=-8.6
-8.6+7.6=-1
-1-2=-3
б) (8,9-2/3)-(-1,2+6 1/3-2 3/58+3/11)+(0,6-4 8/11-2 3/58)= 8,9-2/3+1,2-6 1/3+2 3/58-3/11+0,6-4 8/11-2 3/58=-1.3
-2/3-6 1/3=-7
2 3/58-2 3/58=0
-4 8/11-3/11=-5
8.9+1.2+0,6=10.7
10.7-7-5=-1.3
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Answers & Comments
а) -3,4+(-1 2/9+5,07-6 7/15)-7/9-(-2,53+1 2/15-3,4)=-3,4+-1 2/9+5,07-6 7/15-7/9+2,53-1 2/15+3,4=-3
3.4-3.4=0
-1 2/9-7/9=-2
5.07+2.53=7.6
-6 7/15-1 2/15=-8 9/15=-8 3/5=-8.6
-8.6+7.6=-1
-1-2=-3
б) (8,9-2/3)-(-1,2+6 1/3-2 3/58+3/11)+(0,6-4 8/11-2 3/58)= 8,9-2/3+1,2-6 1/3+2 3/58-3/11+0,6-4 8/11-2 3/58=-1.3
-2/3-6 1/3=-7
2 3/58-2 3/58=0
-4 8/11-3/11=-5
8.9+1.2+0,6=10.7
10.7-7-5=-1.3