Question

(0,4 la patrat+0,perioada1)×1,8
va rog
dau coroana ​

Answer 1

Răspuns:

[0,4²+0,(1)]·1,8=

(0,16+1/9)·18/10=

(16/100+1/9)·18/10=

(4/25+1/9)·9/5=

(36/225+25/225)·9/5=

61/225·9/5=61/25·1/5=

61/125

Answer 2

( 0,4² + 0,(1) ) × 1,8

0,(1) = 1/9

0,4 = 2/5

1,8 = 9/5

( ( 2/5 )² + 1/9 ) × 9/5 =  ( 4/25 + 1/9 ) × 9/5

4/25 + 1/9 = ( 36 + 25 )/225 - numitor comun 225 = 61/225

61/225 × 9/5 simplific 225 cu 9 = 61/25 × 1/5 = 61/125