A 16-slide, editable PowerPoint that focuses on the compensation strategy for subtraction.
This teaching presentation uses animations to outline the compensation strategy when subtracting. The process is shown with rounding and on a number line to enhance the students’ grasp of the concept.
Use this PowerPoint to introduce the concept, or use it as a review tool to reinforce the process.
Use the pen tool during Slide Show mode to complete the problems.
Fluently add and subtract within 20 using mental strategies. By end of Grade 2, know from memory all sums of two one-digit numbers.
Add up to four two-digit numbers using strategies based on place value and properties of operations.
Use place value understanding to round whole numbers to the nearest 10 or 100.
Fluently add and subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.
Recall basic facts to add and subtract within 20 with automaticity;
Add up to four two-digit numbers and subtract two-digit numbers using mental strategies and algorithms based on knowledge of place value and properties of operations;
Solve with fluency one-step and two-step problems involving addition and subtraction within 1,000 using strategies based on place value, properties of operations, and the relationship between addition and subtraction;
Round to the nearest 10 or 100 or use compatible numbers to estimate solutions to addition and subtraction problems;
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