Download presentation

Presentation is loading. Please wait.

Published byKarlie Harnett Modified over 4 years ago

1
012345-2-3-4-5 counting negativelycounting positively Any number above zero is a positive number. Positive numbers are written with no sign or a + sign in front of them and they are counted from zero to the right.

2
012345-2-3-4-5 counting negativelycounting positively Any number below zero is a negative number. Negative numbers are written with a - sign in front of them and they are counted from zero to the left. Always look at the sign in front of a number to see if it is positive or negative.

3
012345-2-3-4-5 counting negativelycounting positively Positive numbers get bigger the further we move right, so 5 is bigger than 2. Negative numbers get smaller the further we move left, so -5 is smaller than -2.

4
012345-2-3-4-5 counting negativelycounting positively Which word, “bigger” or “smaller”, would fit correctly In each of these gaps? -7 is ___________than -1 +62 is ___________than -71 -136 is ___________than -36 smaller bigger smaller

5
As you extend a number line showing negative numbers, they seem to get “bigger.” -10-9-8-7-6-5-4-3-2012

6
-10-9-8-7-6-5-4-3-2012 But as the negative number gets bigger, the value gets lower. -10 is a larger number than -5, so it is further below zero. If you look at the number line you can see that -10 is less than -5. The numbers seem to increase in value as they go down the number line.

7
0 s 2 w 4 em -2 d -4 a What value is letter w? 8 What value is letter a? -10 Which value is bigger -10 or 8? Even though 10 is a bigger number than 8, 8 is bigger because 10 is negative.

8
If it helps you remember, think about the weather. As temperature gets lower the negative numbers seem to get bigger. Spring 7 C o Winter -12 C o Fall -4 C o

9
When the weather changes the temperature can go up or down. If a temperature goes up, gets warmer, it is a temperature increase. If a temperature goes down, gets colder, it is a temperature decrease.

10
During the summer when you wake up, the morning temperature could be 3 C. By lunchtime it is up to 10 C. o o -5 0 5 10 15 -5 0 5 10 15 This is a temperature increase of 7 C. o

11
-5 0 5 10 15 -5 0 5 10 15 This is a temperature decrease of 3 C. o In the early afternoon the temperature is 15 C. By early evening the temperature goes down to 12 C. o o

12
But what happens if we have negative temperatures? -5 0 5 10 15 -5 0 5 10 15 Example: During winter the early morning temperature could be -3 C. By lunch it is up to 6 C. oo This is a temperature increase of 9 C. o From -3 C to 0 C is 3 C. o oo ooo From 0 C to 6 C is a further 6 C. o oo The total of 3 C + 6 C makes 9 C.

13
-5 0 5 10 15 From 3 C to 0 C is 3 C. o oo This is a temperature decrease of 8 C. o In the early afternoon the temperature is 3 C. By early evening the temperature goes down to -5 C. o o -5 0 5 10 15 oo o From 0 C to -5 C is a further 5 C. ooo The total of 3 C + 5 C makes 8 C.

14
C o 14 10 6 What temperature is shown on the thermometer? 2 C o

15
What temperature is shown on the thermometer? -5 C o C o 35 25 10 0

Similar presentations

OK

2.3 Adding Integers 1 Medina. Negative number – a less than zero. 0123456-2-3-4-5-6 Positive number – a greater than zero. 2Medina.

2.3 Adding Integers 1 Medina. Negative number – a less than zero. 0123456-2-3-4-5-6 Positive number – a greater than zero. 2Medina.

© 2018 SlidePlayer.com Inc.

All rights reserved.

To make this website work, we log user data and share it with processors. To use this website, you must agree to our Privacy Policy, including cookie policy.

Ads by Google