Răspuns:
Explicație pas cu pas:
11
b) 18/32 = 9/16
√9/16 = 3/4
c) 45/20 = 9/4
√9/4 = 3/2
12
b) 0,96*0,(6) = 96/100*6/9 = 576/900
576 = 24^2; 900 = 9*100 = 3^2*10^2
√0,96*0,(6) = √576/900 = 24/30 = 8/10 = 0,8
c) 0,27*1,(3) = 27/100*12/9 = 324/900
324 = 18^2
√0,27*1,(3) = √324/900 = 18/30 = 6/10 = 0,6
13
b) 0,6*0,2(6) = 6/10*24/90 = 144/900
√0,6*0,2(6) = √144/900 = 12/30 = 2/5
c) 5,5*0,6(1) = 55/10*55/90 = 55^2/900
√5,5*0,6(1) = √55^2/900 = 55/30 = 11/6
14
b) n = 18 + 5 + 13 = 36
√n = √36 = 6
c) n = 3*16 - 4 + 20 = 48 - 4 + 20 = 64
√n = √64 = 8
15
b) n = 18 : (16 - 14) = 18 : 2 = 9
√n = √9 = 3
c)
n = (30 + 18) : 12 = 48 : 12 = 4
√n = √4 = 2
