# Activities to Teach Students to Use Models to Add Two-Digit Numbers – Without Regrouping

Modeling is a crucial tool in teaching mathematics, especially when it comes to addition. Models allow students to visualize numbers and concepts, making it easier for them to understand and solve problems. If you are looking for ways to teach your students to use models to add two-digit numbers without regrouping, here are some fun and engaging activities to try.

1. Base Ten Blocks

Base ten blocks are physical models that represent numbers using blocks of different sizes. For example, a cube represents one unit, a rod of ten cubes represents ten, and a flat of one hundred represents one hundred. To use base ten blocks to add two-digit numbers, students would represent each number using the blocks, then combine them and count the total.

To make this activity more engaging, you can have students create their own base ten blocks using materials such as paper, cardboard, or plastic. Then, have them use the blocks to add two-digit numbers without regrouping, and share their solutions with the class.

2. Number Lines

Number lines are a visual tool that can help students understand addition as movement along a line. To use number lines to add two-digit numbers without regrouping, students would start at the first number and jump the second number of spaces to find the sum.

To make this activity more engaging, you can have students create their own number lines using paper, rulers, or other materials. Then, have them use the number lines to add two-digit numbers without regrouping, and challenge them to find multiple solutions for each problem.

3. Place Value Charts

Place value charts are another visual tool that can help students understand addition and place value. To use place value charts to add two-digit numbers without regrouping, students would write the numbers in the chart, then add the ones and the tens separately.

To make this activity more engaging, you can have students create their own place value charts using paper, markers, or other materials. Then, have them use the charts to add two-digit numbers without regrouping, and encourage them to use different colors or symbols to represent the ones and tens.

4. Word Problems

Word problems are a great way to apply addition skills in real-world situations. To use word problems to teach students to add two-digit numbers without regrouping, you can create problems that involve adding two-digit numbers, such as:

– John has 45 marbles and his friend gives him 31 more. How many marbles does John have now?

– A candy store sells 63 lollipops and 27 gumdrops. How many pieces of candy did they sell?

To make this activity more engaging, you can have students work in pairs or small groups to solve the problems, and then share their solutions with the class.

In conclusion, using models to teach addition is an effective way to help students understand concepts and solve problems. By incorporating fun and engaging activities such as base ten blocks, number lines, place value charts, and word problems, you can help your students master addition without regrouping and build a strong foundation for future math skills.