I 1. 1/2+1/5-1/10=
=5/10+2/10-1/10=
=7/10-1/10
=6/10
2.10/100×5+5/100×10=
=1/2+1/2
=2/2
=1
3. 2×a=1/3
a=1/3:2
a=1/3×1/2
a=1/6
Răspuns:
Explicație pas cu pas:
1/2 + 1/5 - 1/10 = 5/10 + 2/10 - 1/10 = 6/10 = 3/5
______________
5 * 10/100 + 10*5/100 = 0,5 + 0,5 = 1 leu
_____________
N *2 = 1/3
N = 1/3 : 2 = 1/3 *1/2 = 1/6
