8)a/---/
b/---/+1/
c/---/+1/+1/
Ca sa aflam numerele facem:
21-3(1×3)=18
18:3(segmente egale)=6(un segment)
a=6
b=6+1=7
c=6+1+1=8
V:6+7+8=21
______________________________
9)a-b=24
a+b=90
a/---/
b/---/+24/
Ca sa aflam numerele facem:
90-24=66(doua segmente egale)
66:2(segmentele egale)=33(un segment)
a=33
b=33+24=57
V:57-33=24
57+33=90
_______________________________
11)l/---/---/
ll/---/---/+3/
lll/---/
Ca sa aflam numerele facem:
103-3=100(5 segmente egale)
100:5=20(un segment)
I=40
Il=43
Ill=20
V:43+40+20=103
Sper ca te-am ajutat!!
