Cogito
Grade 1 Math · Chapter 1 · Lesson 8
How Many Do You See?
Put it all together with picture and story problems.
10 problems · about 13 minutes · 1.OA.A.1, 1.OA.B.3, 1.OA.C.6
What this lesson teaches
The child applies subitizing, decomposition, and partners to ten to mixed problems, and chooses a tool that suits the problem.
- You can see numbers without counting.
- You can split a number into two parts.
- You know the partners to ten.
- You can pick the tool that helps you.
Warm-Up Review
From earlier lessons. Loosen up before the new work.
4 problemsReview — One More, One Less: What is one more than 4?
Answer 5
Why One more than 4 is 5.
Review — Partners to Ten: How many more would make ten?
Answer 6
Why 4 and 6 are partners to ten.
Review — All the Ways to Make 8 and 9: 5 and what make 8?
Answer 3
Why 5 and 3 make 8.
Review — All the Ways to Make 6 and 7: 4 and what make 6?
Answer 2
Why 4 and 2 make 6.
Warm Up
Straightforward practice. Get the method working first.
4 problemsHow many dots?
Answer 4
Why A dice four is worth knowing by sight.
6 and what make 10?
Answer 4
Why 6 and 4 are partners to ten.
What is one more than 8?
Answer 9
Why One more than 8 is 9.
Sam says 9 is 5 and 3. Is that right?
Answer No, 5 and 3 make 8.
Why 5 and 3 make 8, not 9. Sam needed 5 and 4.
Stretch Yourself
Mixed problems. Work out what kind of question it is before you start.
2 problemsThe Fruit Bowl: There are 4 apples and 3 pears in a bowl. How many pieces of fruit in all?
Answer 7 pieces
Why 4 and 3 make 7.
The Bus Stop: Five children wait for the bus. Two more come. How many are waiting now?
Answer 7 children
Why A full five and 2 more make 7.