Oblicz w pamięci : c) 4 3/4 - 1/2 =
d) 6 3/4 + 2 1/2 =
e) 6 3/4 - 7/8 =
f) 6 7/9 - 2/3 =
g)1 1/2 - 6/7 =
h)7 3/4 - 5 4/5 =
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c) 4 1/4
d) 9 1/4
e)5 7/8
f) 6 1/9
g) 9/14= 3/4
h) 1 19/20
c) 4 1/4
d) 9 1/4
e)5 7/8
f) 6 1/9
g) 3/4
h) 1 19/20