Răspuns
21 + 0,32 - 1,394 = 21,320 - 1,394 = 19,926
4,12 x 0,134 = 0,55208
2/5 + 1/3 + 1/2 = (12 + 10 + 15)/30 = 37/30
1,2 + 0,(5) - 0,(1) = 12/10 + 5/9 - 1/9 = (108 + 50 - 10)/90 = 148/90 = 1,4(6)
[2/3 + 0,(3)]³·(1/2 + 0,5)²⁰¹⁸ =
= (2/3 + 1/3)³·(1/2 + 1/2)²⁰¹⁸
=(3/3)³·(2/2)²⁰¹⁸
= 1³·1²⁰¹⁸
= 1
(1 - 1/3 - 0,75)·3 =
= (1 - 1/3 - 3/4)·3
= (12 - 4 - 9)/4·3
= (-1/4)·3
= -3/4
