Mathematics
Number Representation & Place Value
Conceptual
5–7 yrs
The teen numbers
十几的数
Description
Understand that the teen numbers (11–19) are composed of ten ones and some further ones (early place value)
Mastery Evidence
- Compose 14 as a group of ten and four ones using objects
- Decompose 17 into 10 + 7 and record as an equation
- Explain that 13 is 'one ten and three ones'
Assessment Prompt
If your child has 14 building blocks, can they see it as one full tower of 10 and 4 left over — understanding 'teen' numbers as ten-and-some-more?
