Content atlas · Common Core State Standards for Mathematics 2010

Use addition and subtraction within 100 to solve one- and two-step word problems involving situations of adding to, taking from, putting together, taking apart, and comparing, with unknowns in all positions, e.g., by using drawings and equations with a symbol for the unknown number to represent the problem.

CCSS.MATH.CONTENT.2.OA.A.1

11 published problems

1. The Chest Room Split — Track an 18-piece order across six equal supply chests and decide where Alex stops.
2. Fence the Wheat Farm — Plan a Minecraft wheat farm, mark its gate, and decide whether the available fence is enough.
3. The Stained-Glass Window — Finish a stained-glass color plan by connecting a fraction’s two numbers to the eight panes.
4. The Ore Cart Graph — Read a Minecraft ore graph, move one cartload, and update the comparison.
5. Nurse Joy’s Poké Ball Packs — Find Nurse Joy’s one packing plan that satisfies both container clues.
6. Rotom’s Pokédex Rectangle — Find Rotom’s hidden rectangle numbers and explain the pattern that always appears.
7. Lakitu’s Hidden Boost Setting — Test Lakitu’s hidden boost setting and prove where every later checkpoint becomes reachable.
8. Neow’s Counterexample — Circle one Slay the Spire hand that disproves Neow’s claim about every hand.
9. The Museum Display — Choose how many museum cases receive sapphires so the finished collection can be shared into equal trays.
10. The Oran Berry Passing Circle — Track three Pokémon berry piles through a passing circle and prove the smallest possible start.
11. The Dangerous-ers’ Drop-Line Test — Rig three Dangerous-ers’ rope lines so Jules can lead the team to one safe ledge—and spot the rope that misses.