Ответы на вопрос:
4.2/9+3.4/9-6.5/9=1.1/9 1)4.2/9+3.4/9=7.6/92)7.6/9-6.5/9=1.1/9 3-2.3/11+2.5/11= -1.8/111) 2.3/11+2.5/11=4.8/112)3-4.8/11= -1.8/11 (8.1/8-5.7/8)+2.5/8=4.7/81) 8.1/8-5.7/8=2.1/42)2.1/4+2.5/8=4.7/8
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