Question

matematyka wokuł nas 1gimnazium zad 1 a,c,f str 18

a

2/5 +0,3 +(0,8-1/2)

c

(1:0,3-2 1/3)-5/6

f

6 2/3*(0,25+1/5)

Answer 1

a)

2/5 + 0,3 + ( 0,8 - 1/2) = 0,4 + 0,3 + (0,8 - 0,5) = 0,7 + 0,3 = 1

c)

(1 : 0,3 - 2 1/3) - 5/6 = (1 : 3/10 - 2 1/3) - 5/6 = (10/3 - 2 1/3) - 5/6 =

= (3 1/3 - 2 1/3) - 5/6 = 1 - 5/6 = 1/6

f)

 6 2/3 * (0,25 + 1/5) = 6 2/3 * (1/4 + 1/5) = 6 2/3 * (5/20 + 4/20) =

= 20/3 * 9/20 = 3