Solving Inequality

Choose the suitable sign:
If

 $18>12,\ then$   $18+\left(-5\right).......\ 12+\left(-5\right)$  

•  $>$  

•  $<$  

Choose the suitable sign:
If

 $21<30,\ then$   $21+\left(15\right).......\ 30+\left(15\right)$  

•  $>$  

•  $<$  

Choose the suitable sign:
If

 $-\frac{1}{3}x\ge27,\ then$   $x\ .......\ -81$  

•  $\ge$  

•  $\le$  

Which number would you add to each side of the inequality to obtain  $x$  ?

 $x+5>9$  

•  $-5$  

•  $-9$  

Which number would you add to each side of the inequality to obtain  $x$  ?

 $x-4<6$  

•  $4$  

•  $-4$  

Which number would you add to each side of the inequality to obtain  $x$  ?

 $x+9>12$  

•  $9$  

•  $-9$  

Which number would you add to each side of the inequality to obtain  $x$  ?

 $x+\frac{1}{3}>\frac{-1}{6}$  

•  $\frac{-1}{3}$  

•  $\frac{-1}{6}$  

Complete the following:
If  $X>Y$ , then  $X+Z\ .......\ Y+Z$  

•  $>$  

•  $<$  

Complete the following:
If  $X<Y$ , then  $X+Z\ .......\ Y+Z$  

•  $>$  

•  $<$  

Complete the following:
If $X<Y$ , and  $Y<Z$ , then

 $X<......$  

•  $Y$ 

•  $Z$