Mathematics·Number Representation & Place Value·conceptual
The multiples of 10
Understand that the multiples of 10 (10, 20, 30 … 90) represent one to nine tens and 0 ones
Suggested ages 6–7
Learning journey
Your child is learning how numbers work by understanding place value — discovering that in two-digit numbers, each digit has a different value depending on whether it represents tens or ones.
Evidence of understanding
- Explain that 30 means 3 tens and 0 ones
- Represent 50 using 5 tens rods and no unit cubes
- Match decade numbers to their tens representation
Assessment prompt
Can The multiples of 10 explain that 60 means 6 tens and no ones — and that this is why the ones column has a zero as a placeholder?
Standards alignment
1.NBT.2.cUS · ccss-math
Multiples of 10
Common Core State Standards for Mathematics · 1