Сложите 20 целых 1/4 м. и 25 см.Сколько получилось варианты ответов: 20м. 50см., 21м., 20м. 1/4см.

1)12 3/7:4 5/6=87/7:29/6=87/7*6/29=18/7=2 4/7

2)8 1/2:14=17/2:1/14=17/28

3)4 2/5-5/8=22/5-5/8=22/5-5/8=176/40-25/40=151/40=3 31/40

4)3 31/40+2 4/7=5+217/280+160/280=5 377/280=6 97/280

5)6 97/280-17/28=1777/280-17/28=1777/280-170/280=1607/280

6)1607/280:33/56=1607/280*56/33=1607/165=9 122/165

1.   |3х - 6| = 12

|3х| = 6

|x| = 2

[x  = 2

[x = -2

2.  |x| = 1

[x = 1

[x = -1

3.  |x| = |x - 3|

x = 3 / 2

x = 1.5