Răspuns :

Cosminnedelcu31id

Răspuns:

3) 50× (50+2)-50×(50-2)= 50×52-50×48=2600-2400=200

2) (400÷10 +5×22)×5=(40+110)×5=150×5=750

4) 2×(X+7)-14=28

2X+ 2x7=28+14=42

2X=42-14=28

X=28÷2=14

Beatrice2k20id

Răspuns:

exercitiul 3

50•(50+2)-50•(50-2)=

50•52-50•48=

2600-2400=200

testul 3, exercitiul 2

[(219+181):10+5•(87-65)]•(140:20-2)=

(400:10+5•22)•(70-2)=

(40+110)•68=

150•68=9600

la exercitiul 4 nu stiu

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