WEBVTT
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29.589 minus 27.7 and is approximately blank to the nearest hundredth.
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Our first step to do this subtraction is line up these two values vertically so that their decimal points are lined up.
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This ensures that we’ve correctly lined up the units from each value, the ones with the ones place, the tenths with the tenths place, and so on.
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And then we need to rewrite 27.7 with two additional zeros as placeholders.
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27.7 is the same thing as 27.700.
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After we do this, we’re ready to subtract.
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Nine minus zero equals nine.
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Eight minus zero equals eight.
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But when we get to the tenths place, we’re trying to subtract seven from five.
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And that’s not possible.
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So we need to borrow from the ones place.
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We have nine ones.
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If we take one of those away, we’ll have eight ones.
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And instead of having five tenths, we would then have 15 tenths.
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And that means we could subtract seven from 15.
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15 minus seven equals eight.
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As we move to the left, we stop to bring down our decimal point.
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Now we have eight minus seven in the ones place, which is one, and two minus two in the tens place, which is zero.
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And so we found the difference between these two values to be 1.889, one and eight hundred eighty-nine thousands.
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But our job is to round to the nearest hundredth.
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And the hundredth place is two places to the right of the decimal point.
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In order to round to the nearest hundredth, we look to the digit after that.
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We look to the digit in the thousandths place.
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Because that’s a nine and it’s greater than five, we need to round the hundredths place up.
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The eight in the hundredths place becomes a nine, and everything to the left of the hundredths place stays the same.
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And so 29.589 minus 27.7 rounded to the nearest hundredth is one and eighty-nine hundredths, 1.89.