Помогите пожалуйста.Надо всё. Created by Eraman. matematika-ru

Помогите пожалуйста.Надо всё...

August 2021 1 3 Report

Помогите пожалуйста.Надо всё

Answers & Comments

twntnplts 1.
а) 15/15 - ( 1/6 + 3/8 ) = 11/24
1) 1/6 + 3/8 = 4/24 + 9/24 = 13/24
2) 15/15 - 13/24 = 1 - 13/24 = 24/24 - 13/24 = 11/24
ответ: 11/24

b) ( 25/28 - 5/14 ) - ( 5/7 - 1/4 ) - 1/28 = 1/28
1) 25/28 - 5/14 = 25/28 - 10/28 = 15/28
2) 5/7 - 1/4 = 20/28 - 7/28 = 13/28
3) 15/28 - 13/28 = 2/28 = 1/14
4) 2/28 - 1/28 = 1/28
ответ: 1/28

с) 16/21 - ( 1/6 + 2/7 ) = 13/42
1) 1/6 + 2/7 = 7/42 + 12/42 = 19/42
2) 16/21 - 19/42 = 32/42 - 19/42 = 13/42
ответ: 13/42

d) ( 35/36 - 5/8 ) - ( 17/18 - 7/9) - 5/72 =
1) 35/36 - 5/8 = 70/72 - 45/72 = 25/72
2) 17/18 - 7/9 = 17/18 - 14/18 = 3/18 = 1/6
3) 25/72 - 1/6 = 25/72 - 12/72 = 13/72
4) 13/72 - 5/72 = 8/72 = 1/9
ответ: 1/9

5.
а) 3/4 - ( х + 1/20 ) = 1/5
3/4 - х - 1/20 = 1/5
7/10 - х = 1/5
-х = 1/5 - 7/10
-х = -1/2
х = 1/2
ответ: х = 1/2

b) 3/7х + 5/20х + 1/3х = 1/5
3/7х + 1/4х + 1/3х = 1/5
180х + 105х + 140х = 84
425х = 84
х= 84/425
ответ: х = 84/425

с) 2/3 - ( х - 1/20 ) = 2/7
2/3 - х + 1/20 = 2/7
43/60 - х = 2/7
-х = 2/7 - 43/60
-х = -181/420
х = 181/420
ответ: х = 181/420

d) 3/5х + 3/20х + 1/4х = 2/7
84х + 21х + 35х = 40
140х = 40
х = 40/140
х = 2/7
ответ: х = 2/7

1 votes Thanks 1

Answers & Comments

bet alysy szine sjlem srochno

suretke arap gime ra8bdf85e84adaf9178f213afae1f8517f 92594

andaj zhanuara arap neni zhasady mysalyinelikke arap tikshaty

pomogite pozhalujsta368def689f148c4250012bfc7be970c2 68143

suretke karap angime kurauecf2f5eb143bc57389f0047b785b3eb4 96803

pomogite pozhalujsta2b681486813b67d6249e2ea3f6db3d35 32384

рекомендуемые вопросы

Helpful Links

Helpful Social