1)(13+p)+87= 13 + p + 87 = 100 + p
2)214+(186+k)= 214 + 186 + k = 400 + k
3)x+349+251=x+600
4)4985+y+1715=y+6700
1)(13+p)+87= 13 + p + 87 = 100 + p
2)214+(186+k)= 214 + 186 + k = 400 + k
3)x+349+251=x+600
4)4985+y+1715=y+6700