1.Выполните действие a) 1 - 4/9 б)8 8/15 - 4 9/20 в)4 - 3 3/4 г)9 4/21 - 4 11/14
д) 7 1/10 - 3 1/6 е)5 5/33 - 4 1/2

Предыдущий
вопрос Следующий
вопрос

a) 1 - 4/9 = 9/9 - 4/9 = 5/9
б) 8 8/15 - 4 9/20 = 8 + 8/15 - 4 - 9/20 = 4 + 8/15 - 9/20 = 4 + 32/60 - 27/60 = 4 + 5/60 = 4 1/12
в) 4 - 3 3/4 = 4 - 15/4 = 16/4 - 15/4 = 1/4
г) 9 4/21 - 4 11/14 = 9 + 4/21 - 4 - 11/14 = 9 + 4/21 - 4*3/14 = 9 + 4/21 - 12/14 = 9 + 4/21 - 36/42 = 9 + 4/21 - 36/42 = 9 + 8/42 - 36/42 = 9 - 28/42 = 9 - 14/21 = 9 - 2/3 = 27/3 - 2/3 = 25/3
д) 7 1/10 - 3 1/6 = 7 + 1/10 - 3 - 1/6 = 7 + 1/10 - 3 - 10/60 = 7 + 6/60 - 180/60 = 7 + 6/60 - 180/60 = 7 - 174/60 = 7 - 87/30 = 7 - 29/10 = 70/10 - 29/10 = 41/10
е) 5 5/33 - 4 1/2 = 5 + 5/33 - 4 - 1/2 = 5 + 5/33 - 4 - 16/33 = 5 + 5/33 - 64/33 = 5 + 5/33 - 64/33 = 5 - 59/33 = 5 - 59/33 = 165/33 - 59/33 = 106/33