Addition and Subtraction Strategies (Grade 2) by Tracy Mingo

Place Value Addition Strategy

tracymingo — 2024-12-02 01:52:37 UTC

This engaging video demonstrates how to break numbers apart using place value to solve addition problems within 100. Perfect for visual learners!

Subtraction with Base-10 Blocks

tracymingo — 2024-12-02 01:52:38 UTC

Watch how to model subtraction problems using base-10 blocks. Great for understanding regrouping concepts!

Grocery Store Math

tracymingo — 2024-12-02 01:52:38 UTC

Sarah bought apples for $45 and oranges for $37. How much did she spend in total?

Strategy Focus: Break apart numbers by place value
45 = 40 + 5
37 = 30 + 7
(40 + 30) + (5 + 7) = 70 + 12 = 82

School Supply Shopping

tracymingo — 2024-12-02 01:52:38 UTC

Tom has $100. He spent $68 on school supplies. How much money does he have left?

Strategy Focus: Count Up
Start at 68
68 + 2 = 70 (+2)
70 + 30 = 100 (+30)
So, 100 - 68 = 32

Number Line Strategy Game

tracymingo — 2024-12-02 01:52:39 UTC

Students practice addition and subtraction using an interactive number line. Great for visual representation of counting on and counting back strategies!

Base-10 Virtual Manipulatives

tracymingo — 2024-12-02 01:52:40 UTC

Use these virtual base-10 blocks to help students understand regrouping in addition and subtraction. Perfect for both classroom and remote learning!

Story Problem Creation

tracymingo — 2024-12-02 01:52:41 UTC

Have students create their own word problems using numbers within 100. They should solve their problems using at least two different strategies. This helps develop both mathematical and writing skills!

Strategy Choice Assessment

tracymingo — 2024-12-02 01:52:41 UTC

Present students with various addition and subtraction problems within 100. Ask them to solve each problem using their preferred strategy and explain their thinking. This helps assess their understanding of different methods!

Standard 2.NR.2

tracymingo — 2024-12-02 01:56:27 UTC

Apply multiple part-whole strategies, properties of operations, and place value understanding to solve real-life, mathematical problems involving addition and subtraction within 100.