Fractions: Addition with same denominator
Revision as of 17:05, 2 June 2009 by Rosalia
- 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
This is an individual 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
Points Of Interest
- To help the child gain a sensorial impression of fraction.
- To introduce the concept and notation of fractions.
- To introduce sensorial exploration of equivalency among fractions.
- To introduce simple operations.