Pomocy, ułamki :(
Oblicz
a) 5/7 + 7/5
b) 1 cała i 1/8 + 3/4
c)1 c. i 1/6 + 2/9
d) 2 c. i 3/5 - 16/7
e) 23/5 - 3 c. i 5/6
f) 2 c. 2/3 - 5c. 1/4 + 0,75
g) 2/3 - 1/2 : 3/4 - 2/3
h) 6/5 - 2/7 : 2/5 + 2/3
i) 1c. 1/2 - 2,75 : 1c 5/6 - 2c. 1/12
Z góry dziękuję. Daję naj :)
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b)1c1/8+3/4=1c1/8+6/8=1c7/8
c)1c 1/6+2c2/9=1c9/27+2c12/27=3c21/27=3c1/3
d)2c3/5-6/7=13/5-16/7=91/35-80/35=11/35
e)23/5-3c5/6=138/30-115/30=23/30
f)2c2/3-5c1/4+0,75=2c8/12-5c3/12+9/12=32-63/12+32/12=(-31/12)+32/12=1/12
g)2/3-1/2:2/5+23=2/3-1/2*5/2+2/3=2/3-5/4+2/3=8/12-15/12+8/12=1