Ответ:
1)5/6×9/15 = 5×9/12×15 =45/180
2)5/12× 4/15 = 5×4/12×15 = 20/180
3) 45/180 - 20/180 = 25/180
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Ответ:
1)5/6×9/15 = 5×9/12×15 =45/180
2)5/12× 4/15 = 5×4/12×15 = 20/180
3) 45/180 - 20/180 = 25/180