Add&Subtract Fractions
What is the difference when you subtract 1/3 from 3/4?
5/12
Rukia had 3 pounds of strawberries. Rukia let her friend Tenzin eat 1/2 of the strawberries. How many pounds of strawberries did Tenzin eat?
1/2 of 3 lbs can be written as 1/2 x 3
Tenzin ate 1 1/2 lbs
Less than 1: 2 x 1/3
Equal to 1: 1/3 x 3
Greater than 1: 1/3 x 5
Is a parallelogram a rectangle?
Always
Sometimes
Never
Sometimes
Look at the picture. What is the sum of the last row?
9
Find the sum when you add 1 1/5 and 2 1/10
3 3/10
In Hawa’s neighborhood, 1/2 of the families have a dog. Of the neighbors who have a dog, 1/2 also have a cat. What fraction of the families in Hawa's neighborhood have both a dog and a cat?
1/2 of the families have a dog.
1/2 of a 1/2 also have a cat.
1/2 x 1/2 is 1/4
1/4 of the families have both a dog and a cat.
Look at the chart. Place the following expressions into the correct boxes.
Less than 1: 1 x 1/8 & 2 x 1/6
Equal to 1: None
Greater than 1: 5 x 1/4 & 6 x 1/3
24 in2
Why did the two fours skip lunch?
Because they already 8!
What is the difference when you subtract 1 7/8 from 3 1/4?
1 3/8
You give each of your 5 friends 2/3 pounds of cookies. How many pounds of cookies did you have in total?
5 groups of 2/3 can be written as 5 x 2/3
5 x 2/3 = 10/3 pounds
Or you can write it as 3 1/3 pounds
You have a recipe that calls for 3/4 cups of flour. You want to triple the recipe. You look in your cabinet and find 2 1/2 cups of flour. Do you have enough flour for your recipe?
If no: how much more do you need?
If yes: how much will you have left over?
Yes!
The recipe will take 2 1/4 cups of flour so you will have 1/4 cups left.
You have a quadrilateral with four equal sides and opposite equal angles. What are you?
Rhombus
Look at the picture. Two questions:
What is the value of 2 popcorn boxes?
What is the value of the last row?
Two popcorn boxes: 6
Value for last row: 16