Strengthen 2nd grade number sense with this engaging two-week Magic of Math unit focused on unknown numbers, missing addends, and finding 10 more, 10 less, 100 more, and 100 less.

This unit includes 10 days of lesson plans and activities that help students develop flexible thinking about numbers through hands-on models, equations, number bonds, place value strategies, games, and problem solving.

Week 1: Unknown Numbers & Missing Addends

Students learn to:

• Find missing addends
• Solve addition and subtraction equations with unknown numbers
• Use number bonds to represent unknowns
• Connect addition and subtraction
• Solve word problems with missing numbers
• Use models and equations to explain their thinking

Students practice these skills through engaging detective-themed activities including Crack the Code, Solve and Reveal, A Trail of Numbers, Missing Cookies, Musical Math, and Find the Prints.

Week 2: 10 & 100 More or Less

Students build place value understanding as they:

• Find 10 more and 10 less
• Find 100 more and 100 less
• Add and subtract 10 and 100
• Use base-ten models
• Work with open number lines
• Apply place value strategies to mental math

Hands-on activities and games give students repeated opportunities to explore how changing the tens or hundreds place affects a number.

What's Included

• 10 days of detailed lesson plans
• Mini-lesson materials
• Hands-on activities and games
• Unknown number and missing addend activities
• Number bond practice
• 10 more and 10 less practice
• 100 more and 100 less practice
• Open number line activities
• Daily word problems
• Interactive notebook printables
• Vocabulary cards
• I Can statements
• Quick assessments

From Domino Math and Race to 1,000 to Flip Smash Solve and Roll Spin Race, the activities give students meaningful practice while keeping them actively involved in the learning.

Standards: Includes activities aligned with 2nd Grade TEKS and Common Core standards for number sense, place value, addition, and subtraction.