1. Oblicz:
( 2 3/4 + 0,15 - 1 8/25) : (2 1/2 - 1 3/4 + 0,04)
(2 3/4 to ułamek dwa i trzy czwarte itd.)
2. Rozwiąż równanie :
2x + 5 = x + 4
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Zad 1.
( 2 3/4 + 0,15 - 1 8/25) : (2 1/2 - 1 3/4 + 0,04) =
(275/100 + 15/100 - 132/100) : (250/100 - 175/100 + 4/100) =
158/100 : 79/100 =
158/100 * 100/79 = 2
Zad 2.
2x + 5 = x + 4
2x - x= 4 - 5
x = -1
2.
2x+5=x+4
5-4=x-2x
1=1