Difference between revisions of "Fractions: Addition with same denominator"
From wikisori
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=== Materials === | === Materials === | ||
| − | *Red fraction circles in green frames (ten circles: 1 is undivided and the others are divided into 2 -10 equal parts. | + | *Red fraction circles in green frames (ten circles: 1 is undivided and the others are divided into 2 -10 equal parts. |
*Label with fractions written on them: 1, 1/2, 1/2, 1/3 | *Label with fractions written on them: 1, 1/2, 1/2, 1/3 | ||
*Pencil and paper | *Pencil and paper | ||
| Line 16: | Line 16: | ||
=== Presentation === | === Presentation === | ||
| − | #Have the child bring out the two trays. | + | #Have the child bring out the two trays. |
| − | #Write two fractions (with the same denominator): 2/6 + 3/6 = | + | #Write two fractions (with the same denominator): 2/6 + 3/6 = |
#Show the child that we first take out 1/6 two times (2/6). | #Show the child that we first take out 1/6 two times (2/6). | ||
#Place these in front of the tray. | #Place these in front of the tray. | ||
#Then take out 1/6 three times (3/6). | #Then take out 1/6 three times (3/6). | ||
#Have the child count how many 1/6 there are. (5) | #Have the child count how many 1/6 there are. (5) | ||
| − | #Show the child how to write the answer as shown: 2/6 + 3/6 = 5/6 | + | #Show the child how to write the answer as shown: 2/6 + 3/6 = 5/6 |
#Read the whole equation with the child. | #Read the whole equation with the child. | ||
#Write another addition problem and have the child do it. | #Write another addition problem and have the child do it. | ||
#After a few equations, point out to the child that "we can only add fractions with the same denominator". For example: 2/4 + 1/4 = 3/4 | #After a few equations, point out to the child that "we can only add fractions with the same denominator". For example: 2/4 + 1/4 = 3/4 | ||
| − | + | <br> | |
<br> | <br> | ||
Revision as of 20:58, 1 June 2009
Contents
Age
4 1/2.
Materials
- Red fraction circles in green frames (ten circles: 1 is undivided and the others are divided into 2 -10 equal parts.
- Label with fractions written on them: 1, 1/2, 1/2, 1/3
- Pencil and paper
- Skittles
Preparation
This is an individual presentation.
Presentation
- Have the child bring out the two trays.
- Write two fractions (with the same denominator): 2/6 + 3/6 =
- Show the child that we first take out 1/6 two times (2/6).
- Place these in front of the tray.
- Then take out 1/6 three times (3/6).
- Have the child count how many 1/6 there are. (5)
- Show the child how to write the answer as shown: 2/6 + 3/6 = 5/6
- Read the whole equation with the child.
- Write another addition problem and have the child do it.
- After a few equations, point out to the child that "we can only add fractions with the same denominator". For example: 2/4 + 1/4 = 3/4
Control Of Error
The Directress.
Points Of Interest
Purpose
Variation
Links
Handouts/Attachments
