Odpowiedź :
Ad 1:
1/6 - X = 1/2
1/6 - X = 3/6
-X = 3/6 - 1/6
-X = 2/6
X = -2/6
X = -1/3
Ad 2:
1/6 - X =2,3/4
1/6 - X = 23/10 * 1/4
1/6 - X = 23/40
20/120 - X = 69/120
-X = 69/120 - 20/120
-X = 49/120
X = - 49/120
Ad 3:
1/6 - X = 2/9
9/54 - X = 12/54
-X = 12/54 - 9/54
-X = 3/54
X = - 3/54
X = - 1/18
1/6 - X = 1/2
1/6 - X = 3/6
-X = 3/6 - 1/6
-X = 2/6
X = -2/6
X = -1/3
Ad 2:
1/6 - X =2,3/4
1/6 - X = 23/10 * 1/4
1/6 - X = 23/40
20/120 - X = 69/120
-X = 69/120 - 20/120
-X = 49/120
X = - 49/120
Ad 3:
1/6 - X = 2/9
9/54 - X = 12/54
-X = 12/54 - 9/54
-X = 3/54
X = - 3/54
X = - 1/18
1.
1/6-?=1/2
1/6 -1/2 = -1/3
1/6 - (-1/3) = 1/2
2.
1/6-?=2,3/4
1/6 - 11/4 = -2⁷/₁₂
1/6 - (-2⁷/₁₂) = 2³/₄
3.
1/6-?=2/9
1/6 - 2/9 = -1/18
1/6 - (-1/18) = 2/9
1/6-?=1/2
1/6 -1/2 = -1/3
1/6 - (-1/3) = 1/2
2.
1/6-?=2,3/4
1/6 - 11/4 = -2⁷/₁₂
1/6 - (-2⁷/₁₂) = 2³/₄
3.
1/6-?=2/9
1/6 - 2/9 = -1/18
1/6 - (-1/18) = 2/9