Question

cat se poate de repede​

Answer 1

Răspuns:

Explicație pas cu pas:

a) 2,4·10+59:10-18,2:2=24+5,9-9,1=29,9-9,1=20,8            

b) (1/3+2/21):(1/18+1/9)-2 1/2=(7/21+2/21):(1/18+2/18)-5/2=9/21:3/18- 5/2= (9/21)·(18/3)-5/2=(9·18)/(21·3)-5/2=(3·18)/21-5/2=18/7-5/2=(36-35)/14=-1/14

c) 4/3:3/9+(12-1)/9·9/11=(4/3)·(9/3)+(11/9)·(9/11)=(4·9)/(3·3)+(11·9)/(9·11)=4+1=5