Question

calculeaza 5supra9+8supra9 -2supra9;1supra2+1supra2+2supra2-3supra2;5supra4-1supra4+3supra4-6supra4;19supra10-7supra10-5supra10+3supra10.

Answer 1

5/9+8/9-2/9=13/9-2/9=11/9
1/2+1/2+2/2-3/2=4/2-3/2=1/2
5/4-1/4+3/4-6/4=4/4+3/4-6/4=1/4
19/10-7/10-5/10+3/10=7/10+3/10=10/10=1

Answer 2

5 / 9 +8/9 - 2 /9=13/9- 2/9= 11/9
1/2 +1/2 + 2/2 -3/2=4/2 -3/2 =1/2
5/4 -1/4 +3/4 -6/4=4/4 +3/4 -6/4=7/4 -6/4=1/4
19/10 -7/10 -5/10 +3/10=12/10 - 5/10 +3/10=7/10 +3/10=10/10