Oblicz.
a) 28 - 2 4/21 + 1 3/7 b) 6 - (1 5/6 + 2 3/5) c) 5 4/6 + (3 11/18 - 1 2/3) d) 4 8/11 - 3 3/8 + 2 9/33 e) 2 3/7 + 4 3/9 - 1 12/14 f) 6 3/5 - 4 1/3 - 2 7/30 Nie piszcie od razu wyników . Daje naj .;3
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a)28-2 1/21+1 3/7=25 20/21+1 9/21=26 29/21=27 8/21
b) 6-(1 5/6+2 3/5)=6-(1 25/30+2 18/30)=6-3 43/30=6-4 13/30=1 i 17/30
c) 5 4/6+(3 11/18-1 2/3)=5 4/6+(3 11/18-1 12/18)=5 12/18+1 17/18=6 29/18= 7 i11/18
d)4 8/11-3 3/8+2 9/33=4 24/33+2 9/33- 3 3/8=6 33/33-3 3/8=7-3 3/8=3 i 5/8
e)2 3/7+4 3/9-1 12/14=2 3/7+4 1/3-1 6/7=2 9/21+4 7/21-1 18/21= 9 16/21-1 18/21=8 37/21-1 18/21=7 19/21
f)6 3/5-4 1/3-2 7/30=6 18/30-4 10/30-2 7/30=2 8/30-2 7/30=1/30
Proszę :)