11 целых 2/19 -(3 целых 17/19+6 целых 14/19);
1)3 17/19+6 14/19=9 31/19=10 12/19;///
2)11 2/19-10 12/19=21/19-12/19=9/19
(7/15-1/6)+2/5=14/30-5/30+12/30=21/30 (3/8-1/9)+25/36=27/72-8/72+50/72=69/72 (8/9-5/6)+2/3=32/36-30/36+24/36=26/36 (7/8-13/20)+9/10=35/40-26/40+36/40=45/40=1 целая 5/40
(3/4-8/15)+17/20=45/60-32/60+51/60=64/60= 1 целая 4/60
2/5 + 5/18 = 2×18+5×5/18×5 = 61/90 примерное= 7/10
<span>111-11=100
3*33+3:3=100
5*5*5-5*5=100
(666-6):66=100
(1*2+3)*4*5=100</span>