Common Core Aligned Resources for 1.OA.B.4
Understand subtraction as an unknown-addend problem. For example, subtract 10 - 8 by finding the number that makes 10 when added to 8.
Showing 1 - 30 of 35 resources
Unknown Numbers in Sums and Differences
1st - 3rd CCSS: Adaptable
You've hit the word problem jackpot with this set of 10 addition and subtraction scenarios! For each, learners have to find a missing number. Sometimes it is the sum or difference, and for others, an addend or minuend. For each, there is...
Living Things and Their Needs: The Math Link
K - 3rd CCSS: Adaptable
Enrich your study of living things with these cross-curricular math activities. Following along with the story Tillena Lou's Day in the Sun, learners will practice addition and subtraction, learn how to measure volume and length, work on...
Study Jams! Relate Addition & Subtraction
3 mins 1st - 4th CCSS: Adaptable
Understanding the inverse relationship between addition and subtraction is essential for developing fluency in young mathematicians. Zoe and RJ explain how three numbers can form fact families that make two addition and two subtraction...
Grade 1 Supplement Set A3 - Number and Operations: Addition and Subtraction on the Number Line
1st CCSS: Adaptable
Hop your way through a mathematical equation with your first grade class as they learn the idea of moving up and down the number line. Adding and subtracting like little frogs is an engaging and clever way to teach/reinforce this concept.