Positive & Negative Numbers

Warm up question:
 $3-1\ =$  

Warm up question:
 $1-3=$  

 $8+-9=$  

 $-9+5$  

 $-10+-10\ =$  

 $12--36\ =$  

 $-20--80\ =$  

 $-47\ +63$  is the same as  $+63\ -\ 47$  

• True

• False

 $-47+63\ =$  

 $6-+39\ =$