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. (A range of algorithms may be used.)
Standard Type
Michigan State Math StandardsRelated Lessons
![lesson thumbnail](https://d15aoc3300f2oo.cloudfront.net/wp-content/uploads/2020/12/math-mights-coll-3.jpg)
Learning about Rounding
Warm up with a Mystery Math Mistake to hunt for the mistake made counting up on the number line. Use a Rekenrek and number line to explore rounding numbers to the nearest ten and hundred.
![lesson thumbnail](https://d15aoc3300f2oo.cloudfront.net/wp-content/uploads/2020/12/math-mights-coll-3.jpg)
Round to the Nearest 10 or 100
Warm up with a Mystery Math Mistake to hunt for the mistake made counting up on the number line. Use place value cards to practice rounding numbers to the nearest ten and hundred.
![lesson thumbnail](https://d15aoc3300f2oo.cloudfront.net/wp-content/uploads/2020/12/math-mights-coll-3.jpg)
Subtract within 1,000
Warm up with a Mystery Math Mistake to figure out what went wrong when adding two 3-digit numbers. Subtract within 1,000 using a number line and compensation and decompose strategies.
![lesson thumbnail](https://d15aoc3300f2oo.cloudfront.net/wp-content/uploads/2020/12/math-mights-coll-3.jpg)
Traditional Method to Subtract within 1,000
Warm up with a Mystery Math Mistake to find a mistake made in using an algorithm for addition and subtraction. Subtract within 1000 using strategies and algorithms based on place value, properties of operations, and/or the relationship between addition and subtraction.
![lesson thumbnail](https://d15aoc3300f2oo.cloudfront.net/wp-content/uploads/2020/12/math-mights-coll-3.jpg)
Find the Area of Figures
Use decomposition to find the area of figures. How will you decompose the figures into rectangles? Engage in a Number Talk and compare your strategies to others.