Harvey's Scribepost

Here is my scribe post for today..


                                                        The equivalency method

 

Number line

                                                                     Five Questions

Here is a video to help you understand


Here is a link to help you with this topic: Link


                                          

Ariel's Scribe post

When subtracting integers, you have to do the following steps so that life is easier:
For an example we will use:
(+97) - (-61)

1. Find the equivalent statement.
Before you all go "Whoa, It's magic" or "This will be impossible" I'll explain how to do this.
a) You have to keep the first number the same
b) You have to convert the operation (in this case subtracting) to its opposite (addition)
c) Change the symbol of the second number from negative to positive or the other way around
In case you can't understand what I am writing here is a picture:

2. Using the information from step one, make a number line. Please do not draw to scale when you have gigantic numbers.
a) Start with zero
b) Go to the first number (97)
c) Draw an arrow going from the first number to either right (if second number is positive) or left (if second number is negative)
Picture:

3. Finally, subtract or add the 2 numbers so you can find the answer of the question.
a) This is self-explanatory

Picture:













4. Now fill in the empty space on the number line
















Now let's try this on different problems:
(+11) - (+43) and (+97) - (+75)

(+11) - (+43) = (+11) + (-43)

Number line:

Math:

Solve:

(+97) - (+75) = (+97) + (-75)

Number Line:

Math:

Solve:

If you are still having issues, here's a video:



Here's a link if you want further help.

Thank you, I hope that this helped

Pamela's Integer Scribepost

Integer Subtraction; Range (-99) to (+99) (D) 3rd Column

Question 1:

(-29) - (-74) = 45
(-29) - (-74) = (-29) + (+74)

Question 2:

(+25) - (+39) = -14
(+25) - (+39) = (+25) + (-39)










Question 3:
(-70) - (+31)= -101
(-70) - (+31)= (-70) + (-31)

Here's a short video of Subtracting Integers on a numberline.
 http://www.youtube.com/watch?v=RDw3Gq-heTw

Here's a link for subtracting integers worksheet.
http://www.onlinemathlearning.com/subtracting-integers.html

Jalaire's Integer Scribepost

3 Questions from the Subtracting/Removing Integers Worksheet. (First column)

Question 1: (-7) - (-4)
     
         Owe 7 remove Owe 4.
Standard Form: -7 - (-4) = -3

Take out the brackets, but leave the brackets in the -4, because it separates the subtraction sign from the negative sign.

Put the answer back into the standard form question, after you have modelled it. 

Question 2: (+1) - (-2)

          

     Have 1 remove Owe 2.

Standard Form: 1 - (-2) = 3

Take out the positive sign in the 1 because it is redundant.

*Redundant- You don't need it there. 

Put the answer back into the standard form question, after you have modelled it. 

Question 3: (-3) - (+7)

     

          Owe 3 remove Have 7.

Standard Form:  -3 - 7 = 

Take out the brackets on both integers. Also take out the positive sign in +7, because the (+) is redundant. The brackets are also redundant, it's not needed. 

Put the answer back into the standard form question, after you have modelled it.

 Here's a link for you to practice subtracting/removing integers!

Here's a video to help you, if you still don't get it.

Abhi's Scribe post

I hope you guys understand this and hope its not blurry. Goodnight. Sweet dreams(: