Szczegółowe wyjaśnienie:
a) 1 3/4 + 1 5/6 = 7/4+ 11/6 = 21/12 +22/12= 43/12=3 7/12
1 1/5+1 5/6 = 6/5+11/6=36/30+55/30=91/30=3 1/30
2 7/8+1 5/6=23/8+11/6=69/24+44/24=113/24=4 15/24
3 4/9+1 5/6=31/9+11/6=62/18+33/18=95/18=5 5/18
b) 1 9/19-3/5=28/19-3/5=140/95-22/95=118/95=1 23/95
2 1/15-3/5=31/15-3/5=31/15-9/15=22/15=1 7/15
1 1/3-3/5=4/3-3/5=20/15-9/15=11/15
3/4-3/5=15/20-12/20=3/20
4 1/2-3/5=9/2-3/5=45/10-6/10=39/10=3 9/10
5 7/20-3/5=107/20-3/5=107/20-12/20=95/20=4 15/20=4 3/4
1 3/7-3/5=10/7-3/5=50/35-21/35=3/5
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Szczegółowe wyjaśnienie:
a) 1 3/4 + 1 5/6 = 7/4+ 11/6 = 21/12 +22/12= 43/12=3 7/12
1 1/5+1 5/6 = 6/5+11/6=36/30+55/30=91/30=3 1/30
2 7/8+1 5/6=23/8+11/6=69/24+44/24=113/24=4 15/24
3 4/9+1 5/6=31/9+11/6=62/18+33/18=95/18=5 5/18
b) 1 9/19-3/5=28/19-3/5=140/95-22/95=118/95=1 23/95
2 1/15-3/5=31/15-3/5=31/15-9/15=22/15=1 7/15
1 1/3-3/5=4/3-3/5=20/15-9/15=11/15
3/4-3/5=15/20-12/20=3/20
4 1/2-3/5=9/2-3/5=45/10-6/10=39/10=3 9/10
5 7/20-3/5=107/20-3/5=107/20-12/20=95/20=4 15/20=4 3/4
1 3/7-3/5=10/7-3/5=50/35-21/35=3/5