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A primary school has 64 classes with 58 students in each class.
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Calculate the total number of students.
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Round your answer to the nearest hundred.
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To find the answer, we’ll need to multiply the number of classes by the number of students in each class: 64 times 58.
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We’ll start with the number in the ones place and we’ll multiply eight times four.
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Eight times four is 32.
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We write down our two and carry the three.
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Next, we multiply eight by six.
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Eight times six is 48.
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But we can’t forget the three that we carried over.
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This means we have 49, 50, 51.
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So we took eight times six, which is 48, and we added three to equal 51.
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Our first row is then 512.
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We added the three.
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So we’re gonna cross it out.
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And then, we’ll move on to our tens place and multiply five times four.
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Five times four is 20.
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So we need to bring down our zero and write our two above the six.
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Remember that when we’re multiplying two digit numbers and we work with the tens place — in this case, our five — we have to leave the ones place empty, where this pink square is.
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Next, we’ll multiply five times six.
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Five times six is 30 plus the two, which is 32.
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And we bring down the 32.
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We’re now finished with the multiplication step and we need to add.
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Two plus zero is two, one plus zero is one, five plus two is seven, and three plus zero is three.
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The first step of our problem told us to calculate the number of students.
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The total number of students is 3712.
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The second step of the question though asks us to round the answer to the nearest hundred.
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So we must round 3712 to the nearest hundred.
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We have a seven in our hundredths place and a one in our tens place.
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Remember when we’re rounding, we always look to the right to see how should we round our place value.
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This one is less than five.
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That means we’re going to round down.
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Our seven stays the same and everything to the right of the seven becomes a zero.
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The number of students rounded to the nearest hundred is 3700.
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There were approximately 3700 students at this primary school.