Question

find the following using number line 6+7+7 18-9 5 *3​

Answer 1

6+7+7=20

18-9= 9

5*3=15

and which grade question is this anyway please try to solve miner questions by yourself if you can't solve this how do you do others problems of mathematics sorry for lecture but don't fell this is lecture☺️☺️☺️☺️