Question

calculeaza in 2 moduri (9+5)*100= 6*(100-50)= (400+80+20):2= (72-36):4=

Answer 1

(9+5)*100=14*100=1400
(9+5)*100=100*9+100*5=900+500=1400
6*(100-50)=6*50=300
6*(100-50=6*100-6*50=600-300=300
(400+80+20):2=500:2=250
(400+80+20):2=400:2+80:2+20:2=200+40+10=250
(72-36):4=36:4=9
(72-36):4=72:4-36:4=18-9=9

Answer 2

( 9 + 5 ) × 100 = 14 × 100 = 1 400 → primul mod 
9 × 100 + 5 × 100 = 900 + 500 = 1 400 → al doilea mod 

6 × ( 100 - 50 ) = 6 × 50 = 300 → primul mod 
6 × 100 - 6 × 50 = 600 - 300 = 300 → al doilea mod 

( 400 + 80 + 20 ) : 2 = 500 : 2 = 250 → primul mod 
400 : 2 + 80 : 2 + 20 : 2 = 200 + 40 + 10 = 250 → al doilea mod

( 72 - 36) : 4 = 36 : 4 = 9 → primul mod 
72 : 4  - 36 : 4 = 18 - 9 = 9 → al doilea mod