Question

Oblicz wartość wyrażenia dla a = 2 , b= -1 , c = 1/4.
a) a + b = c =
b)a(8c - b) =
c)2(a + b )(a - b)c =
d) 1/4(ab + bc + ac) =
e) 4c + b + 10a + 15 / 5 =
f)(a - 2b)( 1 : c) / 8 =

Answer 1

a) 2+(-1) + 1/4 = 1+1/4 = 1 1/4 = 5/4

b) 2(2 - (-1))= 2 x 3 = 6

c)2 x 1 x 3 x 1/4 = 3/2

d) 1/4((-2) + (-1/4) + 1/2)= 1/4 x 7/4 = 7/16

e) 1 - 1 + 20 +3 =23

f)(2+2)(1:1/4)/8 =  4 x 4/8 = 16/8 = 2

 

 

Answer 2

a)2+(-1)+1/4=2-1+1/4=1i1/4

b)2(8*1/4+1)=2(8/4+1)=2+1=3

c)2(2-1)(2+1)+1/4=2*3+1/4=6i1/4

d)1/4(-2+(-1/4)+2/4)=1/4-2/4+2/4=1/4

e)4*1/4+(-1)+10*2+15/5=1-1+20+3=23

f)(2-1)(1:1/4):8=1*1/4:8=1/4:8=4:8=1/2