Question

1,2 pls! Dau coroană!​

Answer 1

Răspuns:

1)

a+b=15

a |........|

b |........|...|+3

sgalam segmentele

15-3=12

aflam numarul mai mic

12:2=6(a)

aflam numarul mai mare

6+3=9(b)

v:6+9=15

2)a-b=71

a+b=89

a |........|....|+71

b |..........|

egalam segmentele

89-71=18

aflam numarul b

18:2=9(b)

aflam numarul a:

9+71=80

v:80+9=89(suma)

80-9=71(diferenta)

coroana!!!