Cogito
Grade 2 Math · Chapter 6 · Lesson 3
Equal Groups
Groups that all hold the same number.
10 problems · about 12 minutes · 2.OA.C.4
Figure — use these to answer the problems
4 + 4 + 4 = 12
Warm-Up Review
From earlier lessons. Loosen up before the new work.
2 problemsFrom “Two Equal Addends”
14 = ? + ? What is each part?
AnswerFrom “Odd or Even”
Is 18 odd or even?
- Even
- Odd
Warm Up
Straightforward practice. Get the method working first.
4 problems5 groups of 4. How many in all?
AnswerWhat must be true of the groups?
- They all hold the same number.
- They are roughly the same.
3 groups of 5. How many in all?
Answer4 groups of 3. How many in all?
Answer
Build It Up
The same ideas with more to keep track of.
2 problems2 groups of 5. How many in all?
AnswerOne plate has 4 buns and another has 6. Are these equal groups?
- No. They hold different numbers.
- Yes. They are both plates.
Stretch Yourself
Mixed problems. Work out what kind of question it is before you start.
2 problemsThe Bike Rack
5 bicycles are in a rack. Each has 2 wheels. How many wheels?
AnswerwheelsPacks of Pens
4 packs each hold 5 pens. How many pens in all?
Answerpens