a) 5 i 1/3 - 2 i 6/7 = 5 i 7/21 - 2 i 18/21 = 4 i 28/21 - 2 i 18/21 = 2 i 10/21
b) 11 i 2/3 + 4 i 1/2 - 5 14/15 = 11 i 4/6 + 4 i 3/6 - 5 i 14/15 = 16 i 1/3 - 5 i 14/15 = 16 i 5/15 - 5 i 14/15 = 15 i 20/15 - 5 i 14/15 = 10 i 6/15
c) 1345 i 123/246 - 1344 i 3/4 = 1345 i 1/2 - 1344 i 3/4 = 1345 i 4/8 - 1344 i 6/8 = 1344 i 14/8 - 1344 i 6/8 = 8/8 = 1
Odpowiedź:
a)=5 7/21+2 18/21=7 25/21=8 4/21
b)=11 20/30+4 15/30-5 28/30=15 35/30-5 28/30=10 7/30
c)=1345,5+1344,75=2690,25=2690 1/4
Szczegółowe wyjaśnienie:
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a) 5 i 1/3 - 2 i 6/7 = 5 i 7/21 - 2 i 18/21 = 4 i 28/21 - 2 i 18/21 = 2 i 10/21
b) 11 i 2/3 + 4 i 1/2 - 5 14/15 = 11 i 4/6 + 4 i 3/6 - 5 i 14/15 = 16 i 1/3 - 5 i 14/15 = 16 i 5/15 - 5 i 14/15 = 15 i 20/15 - 5 i 14/15 = 10 i 6/15
c) 1345 i 123/246 - 1344 i 3/4 = 1345 i 1/2 - 1344 i 3/4 = 1345 i 4/8 - 1344 i 6/8 = 1344 i 14/8 - 1344 i 6/8 = 8/8 = 1
Odpowiedź:
a)=5 7/21+2 18/21=7 25/21=8 4/21
b)=11 20/30+4 15/30-5 28/30=15 35/30-5 28/30=10 7/30
c)=1345,5+1344,75=2690,25=2690 1/4
Szczegółowe wyjaśnienie: