Real Math talk good practice examples of mathematics | Page 6

9 x  11  9  x
10 x  20
x  2
2


x   2 ;  
7) Which sign has to be used between 7 and 8, to get a number bigger than 7 but smaller than 8?
8) Which sign has to be used between 0.3
7.7
0.125 , to get 1?
9) indicate a general interval between   2 ; 4  and  0 ; 5 
2 x
10) solve the inequality
 1 . Say the biggest integer number.
5
11) solve the inequality 4 (x-7) – 2(x+5) > 10 – 8x and say the solution, which belongs to interval
  3 ; 2 
 8
 7
12) compare :
and
9
8
 5
 1
13)
and
12
3
1
14)
and 0 . 3
3
 6 . 5
15)  1 . 3 and
5
0
3
16)
and
0
3
Summarized points and students ‘experts‘ evaluate friend‘s work