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Day 5 - Common Core 4th Grade Mathematics - Domain 3 - Add and Subtract Fractions and Decimals

How to add and subtract fractions (and decimals)
by

Heather Scott

on 6 May 2015

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Transcript of Day 5 - Common Core 4th Grade Mathematics - Domain 3 - Add and Subtract Fractions and Decimals

ADDING AND SUBTRACTING
FRACTIONS AND DECIMALS

On the FIFTH day of math review my teacher taught to me...
HOW TO ADD AND SUBTRACT FRACTIONS
4 - Fractions and Decimals

3 - Traditional Alogorithms

2 - Place Value and Whole Numbers

1- And what the operations mean.
HOMEWORK
ADDING FRACTIONS WITH LIKE DENOMINATORS
SUBTRACTING FRACTIONS WITH LIKE DENOMINATORS
Think of adding pieces of pizza or cake...
Now think of eating those pieces of pizza or cake... is it lunch time yet?
UNIT FRACTIONS
Hmm... what's that mean?
A unit fraction is a fraction with 1 as the numerator.
Are these unit fractions?
3/1
1/7
2/6
10/100
1/999
IMPROPER FRACTIONS
BUT WHAT DO WE DO WHEN THE DENOMINATORS ARE DIFFERENT?!
1. Find a common
denominator
For example:
What is a multiple 3 and 4 have in common?
2. Find equivalent
fractions.
3. Add your new
fractions.
4. Let's try it!
MIXED NUMBERS
When the numerator is BIGGER than the denominator.
PRACTICE
Which of these is improper?
2/3
11/5
8/8
12/6
When we have a whole number AND a fraction.
Which of these is mixed?
Write an example
of an improper fraction
Write an example
of a mixed number.
Adding and Subtracting
DECIMALS

RAPPIN' REVIEW
We've got this!
Game Time
http://www.math-play.com/adding-and-subtracting-fractions-game.html
HOMEWORK
Stop at 2:05
Full transcript