пожалуйста требуется помощь в решении примеров. Created by alina2604b. matematika-ru

пожалуйста требуется помощь в решении примеров...

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3 2 1 4
- 24,6 : ( - 2,35 + 0,7 : 2 1/3) - 15,36 = - 3,36
1) 7/10 : 7/3 = 3/10 = 0,3
2) - 2,35 + 0,3 = - 2,05
3) - 24,6 : (- 2,05) = 12
4) 12 - 15,36 = - 3,36
---------------------------------------------------------
2 1 3 4
(5 5/28 - 5 1/3 * 1,25 - 1 16/21) : (-1,5) =
1) 5 1/3 * 1,25 = 16/3 * 1 1/4 = 16/3 * 5/4 = 20/3
2) 5 5/28 - 20/3 = 145/28 - 20/3 = 3*145/84 - 28*20/84=
= 435/84 - 560/84 = - 125/84
3) - 125/84 - 1 16/21 = - 125/84 - 37/21 = - 125/84 - 37*4/84 =
= - 125/84 - 148/84 = - 273/84
4) - 273/84 : (-1 5/10) = 273/56 = 4 49/56 = 4 7/8

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sedinalana 1)0,7:2 1/3=7/10*3/7=3/10=0,3
2)-2,35+0,3=-2,05
3)-24,6:(-2,05)=12
4)12-15,36=-3,36
-------------------------------------------
1)5 1/3*1 1/4=16/3*5/4=20/3=6 2/3
2)5 5/28-6 2/3=5 15/84-6 56/84=-1 41/84
3)-1 41/84-1 16/21=-1 41/84-1 64/84=-2 105/84=-3 21/84=-3 1/4
4)-3 1/4:(-1 1/2)=13/4*2/3=13/6=2 1/6

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