He was in NASA's Mercury Seven Astronauts
I hope that's help:0
On this problem you don't need to subtract. They want to know the total amount of people who attended so you would add.
1 1 1 (carried over numbers)
12,679 (Line it up with 8491, ones place to ones place and so on)
+8,491
21170 (answer)
Answer:
The Western Front was the place where the most powerful military forces in Europe, the German and French armies, met and where the war was decided.
Explanation: