Question

a+b+c=100
c=3•a
b =c:a
rezolva prin metoda figurativă​

Answer 1

Răspuns:

Sper ca înțelegi din poză

Answer 2

Răspuns:

a+b+c=100

c=3•a

b =c:a

a|---------|

c|---------|----------|-----------|  

b|---------|----------|-----------|--a--I        }100

100-3=97

4 parti egale

97:4=24,25 (a)

24,25×3=72,75 (b)

72,75:24,25=3 (c)

algebric

a+b+c=100

c=3•a

b =c:a=>b=3a/3=>b=3

a+3+3a=100

4a=100-3

a=97:4=>a=24,25

c=24,25×3=>c=72,75