what is 807-629 equal to plus show your work

Question

You have to subtract 807 and 629. You also have to regroup a bunch of times and you also have to show all all the work that you did to find to answer to this subtraction question

Answer 1

807=800+7; 629=600+20+9.

807-629=

800+7-(600+20+9)=

800+7-600-20-9=

(800-600)-(20+9-7)=

200-(29-7)=

200-22.

200=199+1, so 200-22=199+1-22=(199-22)+1=177+1=178.