Cogito
Grade 2 Math · Chapter 8 · Lesson 7
Fourths
Four equal shares, also called quarters.
10 problems · about 12 minutes · 2.G.A.3
What this lesson teaches
The child partitions shapes into fourths and compares halves, thirds, and fourths.
- Four equal shares are fourths, or quarters.
- Two fourths cover the same as one half.
- More shares always means smaller shares.
Warm-Up Review
From earlier lessons. Loosen up before the new work.
3 problemsReview — Thirds: How many thirds make one whole?
Answer 3
Why Three thirds make one whole.
Review — Halves: How many halves make one whole?
Answer 2
Why Two halves make a whole.
Review — Cubes and Solid Shapes: How many faces does a cube have?
Answer 6
Why A cube has 6 square faces.
Warm Up
Straightforward practice. Get the method working first.
3 problemsHow many fourths make one whole?
Answer 4
Why Four fourths make a whole.
What is another word for a fourth?
Answer A quarter.
Why A fourth is also called a quarter.
How many fourths make one whole?
Answer 4
Why All four pieces.
Build It Up
The same ideas with more to keep track of.
1 problemHow many fourths make one half?
Answer 2
Why Half of four.
Stretch Yourself
Mixed problems. Work out what kind of question it is before you start.
3 problemsWhich is bigger, a fourth or a third?
Answer A third.
Why Fewer shares means bigger pieces.
Four Friends: A cake is shared equally between 4 people. How many shares?
Answer 4 shares
Why Four equal shares are fourths.
Two Pieces: How many fourths make one half?
Answer 2
Why Two fourths cover the same amount as one half.