1) (1 3/28-25/42-5/14) : 2 2/13+11/13:1 7/26 = 2) (2 1/12:2 1/2 + (1 9/28-16/35) * 2 6/11-11/30=

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Математика

Евдоня

28 декабря, 13:51

1) (1 3/28-25/42-5/14) : 2 2/13+11/13:1 7/26 = 2) (2 1/12:2 1/2 + (1 9/28-16/35) * 2 6/11-11/30=

+5

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Ниля · Answer 1

1) (1 3/28-25/42-5/14) :

2 2/13+11/13:1 7/26 = 1

-25/42-5/14=-25/42-15/42=

-40/42 = - 20/21

1 3/28-20/21=31/28-20/21=

186/168-160/168=26/168=

13/84

13/84:2 2/13=13/84*28/13=1/3

11/13: 1 7/26=11/13*26/33=2/3

1/3+2/3=3/3=1

2) (2 1/12:2 1/2) + (1 9/28-16/35) * 2 6/11-11/30=

2 1/12:2 1/2=25/12*2/5=5/6

1 9/28-16/35=37/28-16/35=

185/140-64/140=121/140

121/140*2 6/11=

121/140*28/11=11/5

5/6+11/5-11/30=

25/30+66/30-11/30=80/30=2 20/30 = 2 2/3