Use concrete/pictorial models to determine the sum of a multiple of 10 and a one‑digit number in problems up to 99.
Teachers can use 1.3A to sequence instruction on Sums with multiples of 10 and monitor progress toward mastery.
Aligned tasks under 1.3A balance fluency and reasoning so students can explain decisions about Sums with multiples of 10.
Start with concrete or familiar examples, connect to prior knowledge, model a clear process, and provide checks for understanding aligned to 1.3A.
Standard 1.3A describes the essential skills and understandings for Sums with multiples of 10 in Grade 1. It clarifies the learning outcomes and what successful work looks like.
It lays groundwork for the next grade by deepening accuracy and flexibility with Sums with multiples of 10, so students can tackle more complex problems later.
Use short exit tickets and tasks where students explain decisions, show multiple representations, or justify answers—directly aligned to 1.3A.
