Cogito
Kindergarten Math · Chapter 6 · Lesson 1
Ten and Some More
What a teen number really is.
10 problems · about 9 minutes · K.NBT.A.1
What this lesson teaches
The child composes and decomposes teen numbers into ten and some ones.
- Every teen number is ten and some more.
- Fill one frame completely, then count the extras.
- This is the idea all bigger numbers are built on.
Warm-Up Review
From earlier lessons. Loosen up before the new work.
4 problemsReview — Sums That Make Ten: 3 + ? = 10
Answer 7
Why Seven.
Review — Five and Some More: 8 is 5 and how many?
Answer 3
Why Three.
Review — Pairs That Make Ten: 4 and how many make 10?
Answer 6
Why Six.
Review — The Missing Part: 6 + ? = 10
Answer 4
Why Four.
Warm Up
Straightforward practice. Get the method working first.
3 problems18 is 10 and how many?
Answer 8
Why Eight.
12 is 10 and how many?
Answer 2
Why Two extras.
17 is 10 and how many?
Answer 7
Why Seven extras.
Build It Up
The same ideas with more to keep track of.
2 problems10 and 9 is?
Answer 19
Why Nineteen.
10 and 0 is?
Answer 10
Why Just the full frame.
Stretch Yourself
Mixed problems. Work out what kind of question it is before you start.
1 problemThe Pencils: Fifteen pencils. Ten in a box, rest loose. How many loose?
Answer 5
Why Five.