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What is the sum of 171 and 311?
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Let’s take these two values and line them up vertically, one seven one plus three one one.
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When we’re solving an addition problem in this way, we start by adding all the way on the right in the units place.
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One plus one is two.
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We shift to the left one position.
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And we add the tens place.
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Seven plus one equals eight.
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Again, we shift to the left.
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And we add in the hundreds place.
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One plus three equals four.
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This tells us that 171 plus 311 equals 482.