Odpowiedź:
a) 7/9 - 4 - 9 = 7/9- 13= 7/9 - 12 i 9/9= - 12 i 2/9
b) 12/17- 1/7=84/119- 17/119= 67/119
c) 11/18- 5/18= 6/18= 1/3
d) 3 i 3/4 -3/4= 3
e) 2 i 14/15 - 7/15= 2 i 7/15
f) 4 i 5/8 - 3/8= 4 i 2/8= 4 i 1/4
g) 8 i 3/7 - 2 i 2/7= 6 i 1/7
h) 9 i 5/8 - 5 i 3/8= 4 i 2/8= 4 i 1/4
i) 7 i 5/9- 2 i 2/9= 5 i 3/9= 5 i 1/3
Szczegółowe wyjaśnienie:
a)
7/9 - 4 - 9 = 7/9 - 13 = -12 2/9
b)
12/17 - 1/7 = 84/119 - 17/119 = 67/119
c)
11/18 - 5/18 = 6/18 = 1/3
d)
3¾ - ¾ = 3
e)
2 - 14/15 = 1 1/15
f)
4⅝ - ⅜ = 4 2/8 = 4 1/4
g)
8 3/7 - 2 2/7 = 6 1/7
h)
9⅝ - 5⅜ = 6 2/8 = 6 1/4
i)
7 5/9 - 2 2/9 = 5 3/9 = 5 1/3
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Odpowiedź:
a) 7/9 - 4 - 9 = 7/9- 13= 7/9 - 12 i 9/9= - 12 i 2/9
b) 12/17- 1/7=84/119- 17/119= 67/119
c) 11/18- 5/18= 6/18= 1/3
d) 3 i 3/4 -3/4= 3
e) 2 i 14/15 - 7/15= 2 i 7/15
f) 4 i 5/8 - 3/8= 4 i 2/8= 4 i 1/4
g) 8 i 3/7 - 2 i 2/7= 6 i 1/7
h) 9 i 5/8 - 5 i 3/8= 4 i 2/8= 4 i 1/4
i) 7 i 5/9- 2 i 2/9= 5 i 3/9= 5 i 1/3
Szczegółowe wyjaśnienie:
Odpowiedź:
a)
7/9 - 4 - 9 = 7/9 - 13 = -12 2/9
b)
12/17 - 1/7 = 84/119 - 17/119 = 67/119
c)
11/18 - 5/18 = 6/18 = 1/3
d)
3¾ - ¾ = 3
e)
2 - 14/15 = 1 1/15
f)
4⅝ - ⅜ = 4 2/8 = 4 1/4
g)
8 3/7 - 2 2/7 = 6 1/7
h)
9⅝ - 5⅜ = 6 2/8 = 6 1/4
i)
7 5/9 - 2 2/9 = 5 3/9 = 5 1/3
Szczegółowe wyjaśnienie: