1)
(a+b)×2=400
a+b=400:2
a+b=200
|___|___|___|___| a
|___| b
4+1=5 (segmente egale)
200 : 5 = 40 (valoarea unui segment)
a=4×40=160
b=1×40=40
verificare:
(160+40)×2=200×2=400
Varianta corectă.....C. 40 si 160
2)
a) (2+2):(2+2)=1
b) 2+(2:2+2)=5
c) (2+2):2+2=4
3)
92 154 = 90 000 + 2 000 + 100 + 50 + 4