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To find the sum of 3,000 + 400 + 40 + 4 in standard form, you need to add the numbers together.
Start by adding the thousands place value: 3,000 + 400 = 3,400.
Then, add the tens place value: 3,400 + 40 = 3,440.
Finally, add the ones place value: 3,440 + 4 = 3,444.
Therefore, 3,000 + 400 + 40 + 4 in standard form is 3,444.