pierwsze:
2/1*2/3-1/1*9/12+3/1*10/15=
4/3-9/12+2/1=1
6/12-9/12+24/12=
7/12+24/12=
31/12=2 i 7/12
drugie:
5*1/2-2*2/3+3*3/8=
5/1*1/2-2/1*2/3+3/1*3/8=
5/2-4/3+9/8=
60/24-32/24+27/24=
28/24+27/24=
55/24=27/24
trzecie:
17/4-2*1/10+42/40=
17/4-2/1*1/10+42/40=
17/4-1/5+42/40=
170/40-8/40+42/40=
162/40+42/40=
204/40=5 i 4/40=5 i 1/10
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pierwsze:
2/1*2/3-1/1*9/12+3/1*10/15=
4/3-9/12+2/1=1
6/12-9/12+24/12=
7/12+24/12=
31/12=2 i 7/12
drugie:
5*1/2-2*2/3+3*3/8=
5/1*1/2-2/1*2/3+3/1*3/8=
5/2-4/3+9/8=
60/24-32/24+27/24=
28/24+27/24=
55/24=27/24
trzecie:
17/4-2*1/10+42/40=
17/4-2/1*1/10+42/40=
17/4-1/5+42/40=
170/40-8/40+42/40=
162/40+42/40=
204/40=5 i 4/40=5 i 1/10