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Buy on TPT →Looking for a **fun** way to practice using order of operations/PEMDAS to simplify expressions? **You've found it.**

- Standards: CCSS 5.OA.A.1, CCSS 6.EE.A.1
- Topic: Expressions
- Grades: 4th Grade, 5th Grade, 6th Grade

**Chain Reaction** is a zero-prep activity where students work to find the solution to the current problem — **which reveals the next problem on the chain**. Students continue solving all the problems to reach the end of the chain. A small self check is built in per level — if their math is correct, the ending number should match their last solution.

This activity includes four difficulty levels so that you can differentiate students, or play back-to-back to practice. None of the questions overlap.

**What's included?**

**There's 8 pages included:**

4 levels (4 pages) of evaluating expressions using order of operations.

Level 1: Positive integers only (9 problems)

Level 2: Positive and negative integers (9 problems)

Level 3: Positive Decimals (9 problems)

Level 4: Positive Decimals - longer (4 longer problems)

answer key (4 pages)

Note: all four levels include exponents!

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