Cogito
Grade 1 Math · Chapter 1 · Lesson 6
Partners to Ten
Know fast how many more you need to make ten.
10 problems · about 13 minutes · 1.OA.C.6, 1.OA.D.8
What this lesson teaches
The child knows instantly how many more are needed to reach ten, using the empty cells of a ten-frame as the answer.
- Partners to ten are two numbers that make ten.
- The empty spaces in a ten-frame are the answer.
- Knowing these by heart makes adding easier.
Warm-Up Review
From earlier lessons. Loosen up before the new work.
4 problemsReview — 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.
Review — Number Bonds: The whole is 6. One part is 2. What is the other part?
Answer 4
Why 2 and 4 make 6.
Review — Five and Some More: A full five and 3 more. How many is that?
Answer 8
Why Five and 3 make 8.
Warm Up
Straightforward practice. Get the method working first.
3 problemsHow many more would make ten?
Answer 6
Why 4 and 6 are partners to ten.
7 and what make 10?
Answer 3
Why 7 and 3 are partners to ten.
8 and what make 10?
Answer 2
Why Only a couple of spaces would be left.
Build It Up
The same ideas with more to keep track of.
1 problem5 and what make 10?
Answer 5
Why Both rows of the frame are the same size.
Stretch Yourself
Mixed problems. Work out what kind of question it is before you start.
2 problems9 and what make 10?
Answer 1
Why Almost full. Just one gap.
Egg Box: An egg box holds 10. There are 6 eggs in it. How many more fit?
Answer 4 eggs
Why 6 and 4 are partners to ten.