Question

Вычислить 1)5/12-1/3 2)1/5-3/20 3)7/8-5/12 4)9/10-1/6 5)1-11/36 6)1-25/36 7)8/18-8/27 8)25/28-18/35 9)40/143-41/156 10)7/16-5/24 11)9/28-11/35 12)40/63-35/72 13)43/126-41/135 14)2/12-1/12 вычислить дроби помогите!!!!!!

Answer 1

1)1/12
2)1/20
3)11/20
4)11/15
5)25/36
6)11/36
7)4/27
8)53/140
9)29/1716
10)11/48
11)1/140
12)25/168
13)71/1890
14)1/12
как-то так)

Answer 2

1) 5/12 - 1/3 = (5/12)*(2/2) - (1/3)*(4/4) = 10/24 - 4/12 = (10-4)/24 = 6/24 = 1/4

2) 1/5 - 3/20 = (1/5)*(4/4) - (3/20)*(1/1) = 4/20 - 3/20 = (4-3)/20 = 1/20

3) 7/8 - 5/12 = (7/8)*(3/3) - (5/12)*(2/2) = 21/24 - 10/24 = (21-10)/24 = 11/24

4) 9/10 - 1/6 = (9/10)*(3/3) - (1/6)*(10/10) = 27/30 - 10/60 = (27-10)/30 = 17/30

5) 1 - 11/36 = (1/1)*(36/36) - (11/36) = 36/36 - 11/36 = (36-11)/36 = 25/36

6) 1 - 25/36 = (1/1)*(36/36) - (25/36) = 36/36 - 25/36 = (36-25)/36 = 11/36

7) 8/18 - 8/27 = (8/18)*(3/3) - (8/27)*(2/2) = 24/54 - 16/54 = (24-16)/54 = 8/54 = 4/27

8) 25/28 - 18/35 = (25/28)*(5/5) - (18/35)*(4/4) = 125/140 - 72/140 = (125-72)/140 = 53/140

9) 40/143 - 41/156 = (40/143)*(13/13) - (41/156)*(11/11) = 520/1848 - 451/1716 = (520-451)/1848 = 69/1848

10) 7/16 - 5/24 = (7/16)*(3/3) - (5/24)*(4/4) = 21/48 - 20/48 = (21-20)/48 = 1/48

11) 9/28 - 11/35 = (9/28)*(5/5) - (11/35)*(8/8) = 45/140 - 88/280 = (45-44)/140 = 1/140

12) 40/63 - 35/72 = (40/63)*(8/8) - (35/72)*(7/7) = 320/504 - 245/504 = (320-245)/504 = 75/504 = 25/168

13) 43/126 - 41/135 = (43/126)*(135/135) - (41/135)*(126/126) = 5805/17010 - 5166/17010 = (5805-5166)/17010 = 639/17010

14) 2/12 - 1/12 = (2/12)*(3/3) - (1/12)*(6/6) = 6/36 - 6/36 = (6-6)/36 = 0/36 = 0