Question

4.Efectuati
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Answer 1

Explicație pas cu pas:

a:7/2

b:10

c:5/2

d:36/5

e:20/7

f:21

g:4/3

h:5

i:5/14

j:2/15

Answer 2

Răspuns:

Explicație pas cu pas:

a) 5:10/7= 5·7/10= 7/2

b) 4:2/5= 4·5/2= 2·5=10

c) 9:18/5= 9·5/18=5/2

d) 9:5 1/4= 9:21/4= 9·4/21= 3·4/7=12/7

e) 10:7 1/2=10:15/2=10·2/15=2·2/3=4/3

f) 14:2 1/3= 14:7/3= 14·3/7= 2·3=6

g) 4/7:3 1/7= 4/7:22/7=(4/7)·(7/22)=4/22=2/11

h) 5 1/3:3 1/9=(16/3):(28/9)=(16/3)·(9/28)=(16·9)/(3·28)=(16·3)/28=(4·3)/7=12/7

i) 15/14:3=(15/14)·(1/3)=(15·1)/(14·3)=5/14

j) 8 1/10:6=81/10:6=81/10·(1/6)=81/(10·6)=27/(10·2)=27/20