Content atlas · Common Core State Standards for Mathematics 2010

Decompose numbers less than or equal to 10 into pairs in more than one way, e.g., by using objects or drawings, and record each decomposition by a drawing or equation (e.g., 5 = 2 + 3 and 5 = 4 + 1).

CCSS.MATH.CONTENT.K.OA.A.3

2 published problems

1. The Fire-and-Frost Dragon Bridge — Investigate every shortest way the fire and frost dragons can swap sides of the bridge.
2. Firefly Jars — Count four glowing jars, circle the jar with five fireflies, and finish another jar to make five.