Missing Addends

Second graders play two different games to build foundational algebraic reasoning skills. They generate addition and subtraction strategies to determine missing addends and subtrahends through 20. This resource includes everything needed...

Introduce scholars to the commutative and additive identity properties of addition with two sets of practice problems. First, they fill in the missing addend by choosing from a group of three possible answers. These six addition...

Where are all the addends? Addition novices solve 36 equations by filling in the single-digit addend to achieve the given sum. They reference several examples, each of which include object sets to help learners visualize the concept....

In this St. Patrick's Day missing digits instructional activity, students solve for the missing digits in twenty-two addition, subtraction and multiplication equations.

Each slide contains a group of animals and an equation that adds up to 10. However each equation is missing a number, learners attempt to determine the missing addend to revile the number of animals hiding under the cloud. A fun,...

Using Dominoes and clearly organized problems, this presentation allows students to see how subtraction can be used to find a missing addend. Practice problems are included. Tip: While showing this presentation, ask students to think...

You have the answer and a variable, but something is missing! The class fills in the missing addend in 23 practice problems that all add up to 10. This is a great way to build number sense, pattern recognition, and automaticity.

Groups explore sets of 10 items in two varieties (i.e. 3 white buttons and 7 black ones, or 5 bears and 5 bunnies). They brainstorm about their objects, write math sentences to represent what they have, and report their discoveries to...

First graders count bears to predict missing addends. They analyze the missing addend sentence: 7 + ? = 10 and count up from 7 to 10 and check to see if there are 3 bears in the box.

Young mathematicians insert the missing addends to addition problems by making the equations equal on both sides of the equals sign. Students complete ten problems.