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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 400 360 + 230 6 x 3000 1250 - 1000 $7.50 + $7.50 $10 - $7.50

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lesson 14

Lesson 14

The Number Line:

Negative Numbers

slide2

Notes

Mental Math

Links

Activity

Proficiency

Homework

Practice

mental math
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
  • Start with 10. add 2; divide by 3; multiplied by 4; then subtract 5. What is the answer?
slide4

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

slide5

0

-2 0 1

  • Example #1

Arrange these numbers in order from least to greatest

0, 1, -2

Example #2

Compare: -3 -4

Next

slide6

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
Compare: -8 -6
  • <
  • >
  • =
  • None of the above
  • All of the above
what number is opposite of 3
What number is opposite of 3?
  • 0
  • 6
  • -3
  • -6
  • None of the above
what number is 5 less than 0
What number is 5 less than 0?
  • -5
  • 5
  • 0
  • 15
  • None of the above
slide10
5 – 8 =
  • 13
  • 3
  • 40
  • -3
  • None of the above
the desert floor was 186 feet below sea level use a negative number to indicate that number
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
slide13

0

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

Select level 4

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

slide15

0

The Answer is… A

N – 36 = 12 - 3

slide17

0

The Answer is… A

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
Activity

0

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

slide19

0

Lesson 14

Practice A-L

Complete #’s 1-30

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