(1) Add the ones digits: \( 5+4=9 \).
(2) Add the tens digits, including carryover from the ones digit: \( 1+1+1=3 \).
(3) Add the hundreds digit: \( 7+2=9 \).
(4) Combine the digits to get the final answer: 929.

Answer

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Answer

Combine the digits to get the final answer: 929.

Steps

Step 1 ：Add the ones digits: 5+2 = 7.

Step 2 ：Add the tens digits, including carryover from the ones digit: 4+8+1 = 13. Write down '3' and carry over '1'.

Step 3 ：Add the hundreds digit: 5+3+1 = 9. Write down '9'.

Step 4 ：Combine the digits to get the final answer: 929.