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)
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 = ( 3 1/3 - 2 1/3) - 5/6 = 1 - 5/6 = 6/6 - 5/6 = 1/6
f)6 2/3*(0,25+1/5)= 6 2/3 * ( 0,25 + 0,2)= 6 2/3 * 0,45 = 20/3 * 45/100 = 15/5 = 3
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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 = ( 3 1/3 - 2 1/3) - 5/6 = 1 - 5/6 = 6/6 - 5/6 = 1/6
f)6 2/3*(0,25+1/5)= 6 2/3 * ( 0,25 + 0,2)= 6 2/3 * 0,45 = 20/3 * 45/100 = 15/5 = 3