Curriculum placement
Kindergarten. This describes the skill, not a learner estimate.
Adding within 10
Represent joining and solve sums within ten
Problem types
- Join two small groups
Builds on
- Counting objects to 20
- Sorting and counting · Useful idea
Joining the counts of two sorted groups finds how many there are in all.
Leads to
- Number bonds to 10
- Join and separate: pictures, equations
- Subtracting within 10
- Reading a categorical graph · See it applied
The total of two categories in a picture graph is found by joining their counts.
- Measuring length with equal units · See it applied
Joining two pieces measured in the same unit gives a total length that is the sum of their unit counts.
Related skills
- Counting by ones and by tens · Related idea
Counting on from any number adds one each time, so the next number in a count sequence is the previous number plus 1.
- Comparing two groups by matching · Shared foundations
- Odd and even numbers · Shared foundations
- Numerals through 20 · Shared foundations
Open the interactive map to explore lessons and skill connections.