Question

Oblicz:

a)0,8-(5/8:5/4-3,2)=

b)1+(1/6+0,75)×(-1 1/11)=

c)1,5×3,42+1,5×6,58-5/49×9,8=

d)0,25-3×(2/3)²-√5 i/16=

Answer 1

 

a)

 

0,8-(5/8:5/4-3,2) = 0,8 - (0,625:1,25 - 3,2) =

 

= 0,8 - (0,78125 - 3,2) =

 

= 0,8 - ( - 2,41875) =

 

= 0,8 + 2,41875 =

 

= 3,21875

 

b)

 

1 + (1/6 + 0,75) × (-1 1/11) = 1 + (1/6 + 3/4) x ( - 23/11) =

= 1 + (2/12 + 9/12) x ( - 23/11) =

 

= 1 + 11/12 x ( - 23/11) =

 

= 1 - 23/12 =

 

= 12/12 - 23/12 =

 

= - 11/12

 

c)

 

1,5 × 3,42 + 1,5 × 6,58 - 5/49 × 9,8 =  1,5 x (3,42 + 6,58) - 5/49 x 98/10 =

 

= 1,5 x 10 - 1 =

 

= 15 - 1 =

 

= 14

 

 

Answer 2

odpowiedz w załączniku ;d