You can
justify a math statement
or answer by using
objects,
pictures, or
models
of the problem.
Kate
and Kelly want to bring
2
apples
for each of the
15
students in their class.
They have decided that they will
need
30 apples.
Make a model to show this answer
is correct.
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If
each student gets 2 apples, you can count to see they will need
30 apples
in all.
Pete
counted the money
in his pocket.
He had
3
quarters,
2 dimes,
4 nickels
and
6 pennies.
He said he had
$ 1.21.
Make a model with coins to show
his answer is correct.
Counting the coins
25¢,
50¢, 75¢,
85¢, 95¢,
$1.00,
$1.05, $1.10,
$1.15, $1.16,
$1.17,
$1.18,
$1.19, $1.20,
$1.21
Pete had
$1.21
in his pocket.
Kyle
was solving a problem.
He needed to add:
21
+
13
+
42
+
11
=
87
He used place value blocks to
show his answer was correct.
+
+
+
=
The place
value blocks show that the correct answer is
87.
Remember:
Justify
answers by using objects, pictures, or
models of the problem.
25¢,
50¢, 75¢,
85¢, 95¢,
+
Remember: