GLE 0706.1.1 Use mathematical language, symbols, and definitions while developing mathematical

reasoning. GLE 0706.1.6 Read and interpret the language of mathematics and use written/oral communication

to express mathematical ideas precisely.

Studying Math 317

Draw a Picture

Drawing a picture can help you better

understand numbers in a word

problem. For example, a number map

can show how numbers are related to

each other. Start by placing a number

in the center of the map.

Below is a number map that shows various meanings of the decimal 0.5.

Notice that you can add both mathematical meanings and everyday

meanings to the number map.

(^121)
7 5
2
8 4
1011
6
9 3
0.5
five tenths
one-half
hour
$0.50 or
50 cents
(^50) 50%
100
5
10
1
2

=
Practice
Make a number map for each number. (Hint: For whole numbers, think of
factors, prime numbers, divisibility, place value, and so on.)

1. 0.75 2. 0.1 3. 0.01


2. 1.25 5. 2.5 6. 25


3. 45 8. 60 9. 100


4. Refer to Exercise 1. Explain how each mathematical or everyday meaning
   on the number map relates to the decimal 0.75.

Have you heard

the expression

a picture is worth

a thousand words?

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