Question

d) 2 3/4 * 1 5/22
e) 9 2/14 * 42/128 * 11 1/3 * 6/68
f)
g)
h)
Dau coroana!!

Answer 1

Răspuns:

Explicație pas cu pas:

d) 2 3/4 · 1 5/22 = (2·4+3)/4 · (1·22+5)/22=11/4 · 27/22= (11·27)/(4·22)= 27/(4·2)=27/8

e) 9 2/14 · 42/128 · 11 1/3 · 6/68 = (9·14+2)/14 · 42/128 · (11·3+1)/3 · 6/68=

128/14 · 42/128 · 34/3 · 6/68 = (128·42·34·6)/(14·128·3·68)=    (42·34·6)/(14·3·68)= (3·34·6)/(3·68)=(34·6)/68=6/2=3

f) 3/5 · 2/7 · 21/18=(3·2·21)/(5·7·18)=21/(5·7·3)=1/5              

g) 2²/3² · 3/24=(2²·3)/(3²·24)=(2²·3)/24=2²/(3·24)=1/(3·6)=1/18

h) (2³·3)/(4·5)·(2²·3²)/(3·7)=(2³·3·2²·3²)/(4·5·3·7)=(2³·3·3²)/(5·3·7)=(2³·3²)/(5·7)=

(8·9)/(5·7)=72/35