Which addition does the model below represent?
+
-5
-3
-2
- 1
0
1
2
3
4
5
0 3+(-1)
3+4
3+(-4)
3+1
Mark this and return
Save and Exit
Next
Submit

Mike was going to sell all of his stamp collection to buy a video game. after selling half of them he changed his mind. he then bought ten more. how many did he start with if he now has 27?