Question

wer kann mir helfen??​

Answer 1

Răspuns:

Explicație pas cu pas:

13.

a) (3/7)·1/3=(3·1)/(7·3)=1/7

b) (4/8)·2/5=(4·2)/(8·5)=1/5

c) (14/15)·3/8=(14·3)/(15·8)=14/(5·8)=7/(5·4)=7/20

d) 5/8·(8/15)·1/2=(5·8·1)/(8·15·2)=5/(15·2)=1/(3·2)=1/6

e) (9/10)·2/3=(9·2)/(10·3)=(3·2)/10=3/5

f) (7/12)·6/10=(7·6)/12·10)=7/(2·10)=7/20

g) (20/21)·7/10=(20·7)/(21·10)=(2·7)/21=2/3

h) 8/4·(4/9)·3/5=(8·4·3)/(4·9·5)=(8·3)/(9·5)=8/(3·5)=8/15

14.

a) (2 1/4)·(5/6)=9/4·(5/6)=(9·5)/(4·6)=(3·5)/(4·2)=15/8= 1 7/8

b) (7/8)·(4 2/3)=(7/8)·(14/3)=(7·14)/(8·3)=(7·7)/(4·3)=49/12= 4 1/12

c) (2 4/6)·(7/8)=(16/6)·(7/8)=(16·7)/(6·8)=(2·7)/6=7/3= 2 1/3

d) (3 1/2)·(1 3/5)=(7/2)·8/5=(7·8)/(2·5)=(7·4)/5=28/5= 5 3/5

e) (1 3/8)·(1 2/10)=(11/8)·12/10=(11·12)/(8·10)=(11·3)/(2·10)=33/20=1 13/20

f) (3 3/4)·(2 4/5)=(15/4)·(14/5)=(15·14)/(4·5)=(3·14)/4=(3·7)/2=21/2=10 1/2