Question

2. Calculaţi:
a) 32-8,2-0,3); b) (2,4) –5,6:1,4; c) 1,32 -0,2-52 +4,31;
0 (6-0,25).2018; e) 13-11,2:95:) (0,8-0,65).
Calculati. dau coroana ​

Answer 1

Vezi in atașament ! Baftă

Answer 2

Răspuns:

a) 32 - 8,2 - 0,(3) =

= 32 - 82/10 - 3/9

= ¹⁵⁾32 - ³⁾41/5 - ⁵⁾1/3

= (480 - 123 - 5)/15

= 352/15

= 23,4(6)

b) 2,(4) –5,6 : 1,4 =

= (24-2)/9 - 56/10×10/14

= 22/9 - 56/14

= 22/9 - ⁹⁾4

= (22 - 36)/9

= - 14/9

= - 1(5)

c) 1,32 -0,2 - 52 + 4,31 =

= - 50,88 + 4,31

= - 46,57

d) (6 - 0,25)×2018 =

= 5,75×2018

= 11603,5

e) (13-11,2 : 95) : (0,8-0,65) =

= (13 - 112/10×1/95) : 0,15

= (⁹⁵⁰⁾13 - 112/950) × 100/15

= (12350-112)/950 × 100/15

= 12238/950 × 100/15

= 6119/475 × 100/15

= 611900/7125

= 24476/285