1st grade · Math · Unit 12 of 16
One Half
Share fairly and find one half!
What your child practices
One half means 1 of 2 equal parts. Children share items fairly between two people and see that two halves make a whole.
Alabama Course of Study content standard: 1.23 · splitting circles and rectangles into equal shares and naming halves
How we explain it
Children can open this short lesson before they practice.
- Half means two equal parts.
- Both parts must be the same size.
- Half of a number is shared by 2 fairly.
Example: What is half of 8? Share 8 between 2. Each gets 4. Answer: 4
One Half in Alabama
In the Alabama Course of Study, this is unit 12 of 16 in 1st grade Math, after Count It Up and before Hour & Half Hour.
Gradelings describes a child's practice on this unit as Beginning, Approaching, Meeting or Exceeding (Four practice steps). That reflects practice, not a report-card mark: the teacher decides the mark.
Sample questions
A taste of this unit. In the app, questions change every time and get easier or harder to match your child.
Question 1
Which one can be shared fairly between 2 people with none left over?
🍇- 9 grapes
- 8 grapes
- 7 grapes
8 grapes
Hint: Even numbers split into 2 equal groups.
Question 2
What is half of 10?
- 5
- 4
- 8
5
Hint: Half of 10 is the number you get when you split 10 into 2 equal groups.
Question 3
Two friends share a pizza fairly. How many equal parts?
🍕- 2
- 1
- 5
2
Hint: Sharing between 2 means 2 equal parts.
Question 4
A ribbon is cut into 2 pieces. When are they halves?
🎀- when there are 3 pieces
- when both pieces are the same length
- when one piece is longer
when both pieces are the same length
Hint: Halves must be equal.
Question 5
9 cookies are shared by 2 friends. How many are left over?
🍪🍪🍪🍪🍪🍪🍪🍪🍪- 1
- 0
- 2
1
Hint: Make 2 equal groups. One cookie cannot be shared fairly.
Question 6
20 🚗 are shared fairly by 2 friends. How many each?
🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗🚗- 5
- 10
- 8
10
Hint: Make 2 equal groups. Deal them out one at a time.