Lesson 14

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# Lesson 14 - PowerPoint PPT Presentation

Lesson 14. The Number Line: Negative Numbers. Notes. Mental Math. Links. Activity. Proficiency. Homework. Practice. Mental Math. Count up and down by ¼’s between ¼ and 6 8 x 400 360 + 230 6 x 3000 1250 - 1000 \$7.50 + \$7.50 \$10 - \$7.50

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Presentation Transcript

### Lesson 14

The Number Line:

Negative Numbers

Notes

Mental Math

Activity

Proficiency

Homework

Practice

Mental Math
• Count up and down by ¼’s between ¼ and 6
• 8 x 400 360 + 230
• 6 x 3000 1250 - 1000
• \$7.50 + \$7.50 \$10 - \$7.50

0

-8 -7 -6-5 -4 -3 -2-1 0 1 2 3 4 5 6 7 8 9

• Notes

Positive numbers- the points to the right of zero

Negative numbers- points to the left of zero

Integers- Positive & negative numbers and 0

0

-2 0 1

• Example #1

Arrange these numbers in order from least to greatest

0, 1, -2

Example #2

Compare: -3 -4

Next

0

Order matters and subtraction. Start at 2 and count to the left five integers. You should end up at - 3

• Example #3
• Subtract 5 from 2

-4-3-2 -1 0 1 2 3 4 5 6 7 8 9 10

What number is 7 less than 3?

-5 -4 -3 -2 -1 0 1 2 3 4 5 6 7

Compare: -8 -6
• <
• >
• =
• None of the above
• All of the above
What number is opposite of 3?
• 0
• 6
• -3
• -6
• None of the above
What number is 5 less than 0?
• -5
• 5
• 0
• 15
• None of the above
5 – 8 =
• 13
• 3
• 40
• -3
• None of the above
• True
• False
The desert floor was 186 feet below sea level. Use a negative number to indicate that number
• 186
• 0
• 374
• -186
• None of the above

0

http://www.math.com/school/subject1/lessons/S1U4L6GL.html

Select level 4

http://www.kidsmath.com/e_int.html

0

N – 36 = 12 - 3

0

Change each fraction to a decimal, the compare.

A 3/8 = .375; .38; 2/5= .4; 4/9 = .44; .49

B .38; 2/5 = .4; 3/8 = .375 (stop)

C .38; .49; 3/8 = .375 (stop)

D .49; .44 (stop)

Activity

0

A dot cube has six faces. Where two faces meet, there is an edge. How many edges does a dot cube have?

0

Lesson 14

Practice A-L

Complete #’s 1-30