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What expression can be used to show dividing 18 boxes into

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two equals stacks?

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Find the expression three times using different ways to

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write division.

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Find the value of the expression.

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So let's just do this top part right here.

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We have 18 boxes, and we want to divide them into two equals

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stacks, so we want to divide 18 by 2.

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And the way we would write this, and we'll think a little

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bit more about what this means, we could write

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this as 18 over 2.

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This means 18 divided by 2.

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We could write it as 18 divided by 2, just like that,

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or we could write it as 18 divided by 2.

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Now before we evaluate it, they say find the value of the

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expression.

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Let's think about what this means.

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We have 18 boxes and we want to divide them

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into two equal stacks.

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Let me draw 18 boxes.

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So I have 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12-- almost

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there-- 13, 14, 15, 16, 17, 18.

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So those are my 18 boxes, and I divide them into two equals

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stacks or two equal groups.

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So if I want to divide these into two different groups that

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have the same number of boxes, I could just eyeball it, and

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say, well, let's make these top ones one group.

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Let's make that one of the groups, and let's making these

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bottom ones another group.

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And these are equal groups.

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How many do we have in each group?

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Well, in the top one, we have one, two, three, four, five,

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six, seven, eight, nine, and in the bottom one we have one,

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two, three, four, five, six, seven, eight, nine.

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So we've split it into two groups of nine.

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So 18 divided into two equal groups is equal to 9, or 18

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divided by 2 is equal to 9, or 2 goes into 18 nine times.

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