# Math Lesson - Enrichment, Addition and Subtraction within 100, Grade 2

In the Enrichment lesson, designed for Grade 2 students, we delve deeper into the chapter on Addition and Subtraction within 100, a cornerstone unit of Foundations in Operations Within 1000. This lesson is crafted to strengthen and expand students' understanding and skills in basic arithmetic operations, ensuring a solid foundation for more complex mathematical concepts in their academic future.

Through engaging activities such as the Counting Coral Worksheet, students will embark on an undersea adventure, applying their counting skills in vibrant coral ecosystems. This activity not only reinforces their ability to count but also introduces them to the concept of addition within a playful and visually stimulating context.

Similarly, the Triathletes in Training Worksheet offers a dynamic approach to learning subtraction. By helping triathletes prepare for their competitions, students practice subtracting numbers within 100, promoting critical thinking and problem-solving skills in real-world scenarios.

Learning these foundational concepts is crucial as they serve as building blocks for more advanced mathematical operations. Mastery of addition and subtraction within 100 paves the way for understanding operations within 1000 and beyond, equipping students with the necessary skills for academic success in mathematics.

Estimated classroom time: 6 min
Chapter: Addition and Subtraction within 100
Unit: Foundations in Operations Within 1000
Click on any activity below to start learning.
1st
3:00 min
Counting Coral Worksheet
worksheet
2nd
3:00 min
Triathletes in Training Worksheet
worksheet
Share your lesson with students by clicking:
• ### Activity 1 / Counting Coral Worksheet

A marine biologists is a professional who studies underwater life. Marine biologists mainly concern themselves with the happenings in water. Does your child want to be a marine biologist when they grow up? Introduce them to the team of marine biologists in this worksheet who have spent three days planting new coral to keep the coral reef healthy. The team has already spent two days planting, and are looking to figure out how much of each specie they need to plant on the third day to reach their goal. Help your child figure out the answer and check it on the printout.

• ### Activity 2 / Triathletes in Training Worksheet

A triathlon is a sporting competition where contestants participate in three different sporting events; swimming, biking and running. Has your child participated in a triathlon before, or had reason to witness one take place? The two kids in this worksheet, Sara and Carlos are training hard for an upcoming triathlon. They need your child’s help to figure out how many miles they have already swam, ran and biked. Your little one needs to solve the addition problems to help them do that. Help your kids check the correct answers.