Question

vă rog dau coroana ​

Answer 1

Răspuns:

a)2,8·4,5-1,7·5,2=12,6-8,84=3,76

b) 1,4·(2,1-0,3):2=1,4·1,8:2=2,52:2=1,26

c) c)[2,(3)·0,3+7,(1)·4,5]:1,2=

2,(3)=(23-2)/9=21/9=7/3

7,(1)=(71-7)/9=64/9

0,3=3/10

4,5=45/10=9/2

1,2=12/10=6/5

[7/3·3/10+64/9·9/2]:6/5=(7/10+¹⁰⁾32):6/5=327/10·5/6=327/12=27,25