Compose and decompose teen numbers 11-19 as ten ones and some further ones (K.NBT.A.1)
Exercise
Difficulty 2
~1 min
math.gK.s.ex_24
Build Teen
Prompt
Build 13 on your double ten-frame. Fill the FIRST ten-frame first, then add ones to the second.
M-K-S-EX-24-A
Manipulative
Physical / non-image
Photo of a double ten-frame mat with the first 5x2 frame fully filled (10 yellow counters) and the second 5x2 frame with 3 red counters in the top row.
How it's presented
mode
manipulative
Answer criteria
type
manipulative config
expected
first_frame_10_filled_second_frame_3_filled
Hints
- Fill the whole first frame with 10 counters.
- Then add 3 more to the second frame.
Misconceptions to watch
- Spreads counters across both frames randomly
- Builds 31 instead (digit reversal)
Used in lessons