Ответы на вопрос:
А) 3 4/15: 8 2/5= 1 1/2f: 6 6/7 49/15: 42/5=3/2f: 48/7 49/15×5/42=3/2f: 48/7 245/630=3/2f: 48/7 7/18=3/2f: 48/7 3/2f=48/7: 7/18=48/7×18/7=784/49=16 f=16: 3/2=16/1×2/3=32/3=10 2/3 б) 5,6а: 0,9=6,4: 7,2 56/10а: 9/10=64/10: 72/10 28/5а: 9/10=32/5: 36/5 28/5а: 9/10=32/5×5/36 28/5а: 9/10=160/180=8/9 28/5а=8/9×9/10=72/90=8/10=4/5 а=4/5: 28/5=4/5×5/28=20/140=1/7
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