Mathematics·Number Representation & Place Value·conceptual
The teen numbers
Understand that the teen numbers (11–19) are composed of ten ones and some further ones (early place value)
Suggested ages 5–7
Learning journey
Your child is building number foundations — learning to read and write numbers up to 100, understanding number words, and beginning to see how numbers are built from tens and ones.
Evidence of understanding
- 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 The teen numbers 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?
Standards alignment
1.NBT.2.bUS · ccss-math
Composition of numbers 11 to 19
Common Core State Standards for Mathematics · 1
K.NBT.1US · ccss-math
Compose and Decompose Numbers 11-19
Common Core State Standards for Mathematics · K