MATH 156
posted by CHAYO .
What models can be used to help explain the concepts of addition and subtraction of rational numbers? What are the benefits to using such a model? What limitations does the model have? Create an addition or subtraction problem and demonstrate how the model might work.

Cutting a pie into equal slices so you can add or subtract them.
EXAMPLE: 1/4 + 1/2 = 3/4. To get the half slice to equal the size of the quarter slice, you need to cut it in half. Then the half slice becomes two quarter slices. When you add all of the quarter slices together, you have three of them: the original quarter slice, plus two more from cutting the half slice in half to get two more quarter slices that you could add with the original to get a total of 3 quarters, or 3/4. 
(and for whole numbers, you can think of them as representing entire pies, so when you add or subtract them, no slicing is necessary.)

CAN YOU PLEASE EXPLAIN EACH QUESTION I'M A LITTLE CONFUSED I'M STUDYING FOR MY MID TERM THAT i'M GOING TO HAVE IN TWO WEEKS. THANKS

Why don't you explain what you think it means, and let us critique that? We have no idea what you don't understand, the questions to me are straightforward.

Oh I get it now thanks I was a little confused.

This is not for a mid term, this is a discussion question for a class, I'm taking it too!

What models can be used to help explain the concepts of addition and subtraction of rational numbers? What are the benefits to using such a model? What limitations does the model have? Create an addition or subtraction problem and demonstrate how the model might work.
Respond to this Question
Similar Questions

Math
using the numbers 241272...in any addition subtraction division or multiplication combination, i have to come up with the sum of 24. Help. 
Math
Using the definition of subtraction to determine the subtraction equations that are related to each of the following addition equation: a.8+7=n b.14+x=25 c.r+s=t my answers are this: a. n7=8 b.x=2514 c.ts=r did I do these right? 
Very easy math
my teacher told me that the inverse of addition was subtraction and that the inverse of subtraction was addition... could you prove it to me x = (1)x ((1)x)^1 I don't see how I'm suppose to get + x by taking the inverse of x i've … 
6TH GR. ALGEBRA
EXTENDING THE LESSON If you add any two rational numbers, the sum is always a rational number. So, the set of rational numbers is closed under addition. Is the set of rational numbers closed under subtraction. multiplication,and division … 
math
What models can be used to help explain the concepts of addition and subtraction of rational numbers? 
math
using exactly four 4s and only addition, subtraction, multiplication, and division, write an expression that equals each of the numbers from 1 to 10. you do not have to use all the operations, and numbers such as 44 are permitted 
math
Using the numbers 5, 8, and 24, create a problem using no more than four operations (addition, subtraction, multiplication, division, square, square root, cube, cube root) where the solution will be an irrational number. Explain why … 
Math
How do problem solving using model addition and subtraction 
MATH
HOW IS ADDITION & SUBTRACTION OF POLYNOMIALS SIMILAR TO ADDITION & SUBTRACTION OF RADICAL EXPRESSIONS? 
Math
How is combing radicals by addition and subtraction similar to combining monomial expressions by addition and subtraction?