Question

valeria si alecsa a8u impreuna 38 depapusi valeria are cu 18 papusi mai mult cate papusi are fiecare? prin metoda grafice

Answer 1

V |-----|+18| 
A |-----|          } 38.

38 - 18 = 20  ( 2 segmente egale)
20 : 2 = 10 papusi ( are Alexa)
10 + 18 = 28 papusi ( are Valeria)
Verificam : 10 +28 = 38.

Answer 2

a +b =38
a=18+b

B /--------/
A/---------/------/  }38

18+b+b=38
2xb=38-18
2xb=20
b=20:2=10
b=10

a=18+b
a=18+10=28
a=28

PROBA:
a+b=28+10=38