Addition examples

This task is about using an algorithm to add numbers.
Write your answers in the boxes. You can use the remaining area to do your working.
1.
  5
+ 8


  
2.
  6
  3
  8
  7
+ 4


   
3.
  42
+ 35


   
4.
  87
+ 56


   
5.
  237
+ 436


   
6.
  5607
  3294
  6358
+ 7286


   
7. 36 + 117 + 6 + 23 + 240 =