Question

Oblicz i wynik podaj w postaciu ułamka zaokrąglając do 0,01 :
a) 1 1/4 - [1/2 + 3/5 x (-1,2) ] x (-2) =
Obilicz :
a) 4/7 x (-3,5) + 1/3 =
b)2/3 x 4,8 - 5 1/2 =
c)-2,5 x (-4) - 2 1/4 x (-1 1/3 ) =
d) 7,4 - ( 2,4 : 3/4 + 3/8 : 1,5 ) =

Answer 1

A) 11/4-[1/2+3/5*(-1,2)]*(-2)=11/4-[1/2+3/4*(-12/10)]*(-2/1)=11/4-(1/2-9/10)*(-2/1)=11/4+4/10*2/1=11/4+4/5=55/20+16/20=71/20=3,55
b)2/3*48/10-5 1/2=16/5-11/5=5/5=1
c)-25/10*(-4/1)-2 1/4*(-1 1/3)=10/1-9/4*(-4/3)=10/1+3/1=13
d)74/10-(24/10*4/3+3/8*10/15)=74/10-(16/5+1/4)=74/10-(64/20+5/20)=74/10-59/20=148/20-59/20=89/20=4,45