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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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