# Fluently Add And Subtract Using Standard Algorithm Math Games

4 games

In this series of games, your students will learn to fluently add and subtract multi-digit whole numbers using the standard algorithm. The Fluently Add And Subtract Using Standard Algorithm learning objective — based on CCSS and state standards — delivers improved student engagement and academic performance in your classroom, as demonstrated by research. This learning objective directly references 4.NBT.B.4 as written in the common core national math standards.

Scroll down for a preview of this learning objective’s games and the concepts.

## Concepts Covered

When moving to the right across the places in a number, the digits represent smaller units. Position the unknown quantity on the left and right side of the equal sign. Use written methods without concrete models. Use algorithms for addition and subtraction that allow scholars to regroup place value when necessary i.e. lattice and scratch algorithm. Use properties to determine sums and differences.

Standard algorithms for addition and subtraction are based on decomposing numbers written in base-ten notation. This reduces the addition or subtraction of two multi-digit whole numbers to a collection of single-digit computations of place-value units. Ones can be added with ones, tens with tens, and hundreds with hundreds. For subtraction, students need to evaluate whether ungrouping and regrouping is necessary. Students may either treat each place value column separately and ungroup and subtract before moving on. For subtraction, you can also check all potential ungroupings first and then perform all the subtractions.

A preview of each game in the learning objective is found below.

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