Problem 15 worked answer
Firefly Jars
Designed for Kindergarten · Uses Late Kindergarten math · About 1–3 minutes
Earn one jewelZircon FragmentLevel 1
At a glance
- Part 1: Circle Jar B.
- Part 2: Draw 2 more fireflies in the large Jar D.
1. Find the jar with five
Count each firefly picture once:
- Jar A has 4 fireflies.
- Jar B has 5 fireflies.
- Jar C has 6 fireflies.
- Jar D has 3 fireflies.
Only Jar B has 5, so circle Jar B.
2. Finish Jar D
The large Jar D begins with 3 fireflies. Count on from 3 to 5: 4, 5. Draw one new firefly for each number. That adds two fireflies.
A complete response circles Jar B, draws 2 more fireflies in the large Jar D, and writes 2 beside “More drawn.”
Check
Counting the finished drawing should give five pictures: the original 3 plus the added 2. Subtraction confirms the number added: . The result is not Jar A or C because their counts are 4 and 6, not 5.
Technical fit and rating
MJ K.7 · C1 · W1
Routine challenge · Light workload
Number and operations
How the rating works →mathjewels.com/answers/problems/15/