Lesson 14 - PowerPoint PPT Presentation

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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 400360 + 230 6 x 30001250 - 1000 \$7.50 + \$7.50\$10 - \$7.50

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Lesson 14

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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 400360 + 230

• 6 x 30001250 - 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

0

N – 36 = 12 - 3

0

0

Change each fraction to a decimal, the compare.

A3/8 = .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