Perform the calculations: 1) 47312 + 429143; 3) 1215147 + 997995;

Here are the calculations:

1) $$47312 + 429143 = 476455$$
Explanation: Adding the two numbers together results in 476455.

3) $$1215147 + 997995 = 2213142$$
Explanation: Adding the two numbers together results in 2213142.