Add and Subtract Within 20

This video presents a comprehensive tutorial on basic addition, specifically focusing on the problem 7 + 6. It demonstrates three distinct strategies to solve the equation, moving from concrete visual representations to more abstract mathematical concepts. The narrator first uses digital manipulatives (tomatoes and blueberries), then transitions to a number line approach, and finally introduces the concept of place value by grouping numbers to "make a ten." The key themes explored include one-to-one correspondence, counting on, using linear models for calculation, and the fundamental structure of teen numbers. The video places significant emphasis on decomposing numbers to facilitate mental math, specifically showing how 7 + 6 can be understood as (7 + 3) + 3, or 10 + 3. This conceptual bridge explains why the number 13 is written with a '1' in the tens place and a '3' in the ones place. For educators, this resource is highly valuable for bridging the gap between simple counting and computational fluency. It visualizes the "making ten" strategy, which is a critical standard in early elementary mathematics. Teachers can use this video to differentiate instruction, offering multiple entry points for students who learn best through visual aids, linear movement, or structural number sense.

This educational video demonstrates the process of adding numbers up to 20 without regrouping using the Concrete-Pictorial-Abstract (CPA) framework. Through clear animations, it guides students on how to solve the equation 14 + 4 by using virtual base-10 blocks placed on a place value chart alongside standard vertical written notation. The video explores key mathematical themes including place value (distinguishing between tens and ones), modeling numbers with manipulatives, and the step-by-step algorithm for column addition. It explicitly connects the physical act of combining 'ones' blocks to the abstract action of writing the sum in the ones column of an equation. For educators, this resource is an excellent visual aid for introducing or reinforcing early addition strategies. It supports visual learners by clearly separating the tens and ones columns and provides a model for how students can use physical manipulatives at their desks to solve similar problems. It serves as a perfect bridge between counting individual items and understanding the structure of two-digit addition.

This educational video introduces early learners to the concept of decomposing the number 5 and finding missing addends. Through a clear, step-by-step visual demonstration, the narrator uses five-frames (a row of five boxes) to illustrate different number combinations that equal 5. The video specifically explores the pairs 3+2, 2+3, 4+1, and 1+4, using colorful hand-drawn objects like circles, stars, blocks, and smiley faces to make the abstract math concrete. The key themes explored are basic addition, the concept of a "mystery number" or missing addend (algebraic thinking), and the commutative property of addition (though not named explicitly, it is demonstrated by showing that 3+2 and 2+3 both equal 5). The video emphasizes visual counting and the relationship between the part and the whole. For the classroom, this video is an excellent tool for introducing number bonds of 5 or reinforcing fluency with addition facts within 5. The visual model of filling in empty boxes helps students bridge the gap between counting objects and understanding symbolic addition equations. It naturally encourages students to pause and predict answers, making it an interactive resource for whole-group instruction or independent practice stations.

This instructional video guides early learners through the concept of "number bonds" for the number 7, effectively demonstrating the part-part-whole relationship in addition. Using concrete manipulatives (colored linking cubes) alongside an abstract visual model (number bond diagram), the video systematically explores different pairs of numbers that sum to seven. The clear, uncluttered presentation allows students to focus entirely on the mathematical relationships being demonstrated.

This educational video guides students through the process of solving two distinct math word problems using a whiteboard demonstration. The first scenario involves a group of superheroes where students must use subtraction to determine the number of "real" superheroes after identifying impostors. The second scenario asks students to calculate the total number of sea monsters in a lake by adding together two groups with different physical characteristics (stripes and spots). The video explores key mathematical themes including translating written text into numerical equations, understanding part-whole relationships using number bonds (visual diagrams), and performing basic addition and subtraction operations with numbers up to 20. It demonstrates how to set up equations for missing addends (3 + ? = 14) and how to convert them into subtraction problems (14 - 3 = ?). Ideally suited for early elementary classrooms, this resource models a clear thinking process for tackling word problems. By using engaging characters like superheroes and sea monsters, it captures student interest while providing a concrete strategy—drawing number diagrams—to visualize abstract problems. Teachers can use this video to introduce problem-solving strategies or as a practice activity for students learning to distinguish between when to add and when to subtract.

This engaging music video helps students master basic addition facts by focusing specifically on adding the number 2. Through a catchy pop-rock song, the video systematically runs through addition equations starting from 2 + 1 up to 2 + 15. The visual presentation is clear and distraction-free, displaying each equation on screen as it is sung, allowing students to both hear and see the math facts simultaneously. The content explores the specific arithmetic pattern of adding two to sequential integers. Unlike skip-counting videos, this resource focuses on the operation of addition itself, demonstrating how increasing the addend by one results in the sum increasing by one. It covers three distinct sets of numbers: 1-5, 6-10, and 11-15, helping students build fluency with sums up to 17. Teachers can use this video as a high-energy warm-up to start a math block or as a transition activity to get students refocused. It serves as an excellent tool for auditory learners who struggle with rote memorization using traditional flashcards. The rhythmic nature of the song aids in retention, making it a valuable resource for building automaticity in first and second-grade math fluency.