Recognising Halves in Math
Year 3 Mathematics NSW Life Skills Curriculum
What is a Half?
A half means one of two equal parts We write it as 1/2 Both parts must be exactly the same size
Think About It
Can you think of things at home that you might split in half? What would happen if the two parts weren't the same size?
Halves in Food
Pizza slices Sandwich halves Orange segments Chocolate bars
Spot the Half
Look at the shapes on the screen Point to the ones that show halves Remember: both parts must be equal!
Equal Parts Rule
Both halves must be the same size Both halves must be the same shape If they're different, they're not halves!
Halves vs Not Halves
{"left":"Circle split down the middle\nRectangle split into two equal parts\nTriangle cut into two identical pieces","right":"Circle split unevenly\nRectangle with one big and one small part\nTriangle cut into different sized pieces"}
Draw Your Own Halves
Draw a circle Add a line to split it in half Make sure both parts are equal Try with different shapes!
Halves in Nature
Butterfly wings Leaf patterns Flower petals Animal faces
Nature Detective
Can you find halves in your garden? What about on your pet's face? Look for matching patterns!
Halves in Toys and Games
Toy cars split down the middle Playing cards - red and black halves Building blocks Board game pieces
Half or Not Half?
I'll show you pictures Raise your hand if it shows a half Explain your answer Remember our equal parts rule!
18 more slides available after you open the deck.
Download all 30 slides