Today in math class we worked with subtracting two and three digit numbers. We reviewed the "counting up" method which was introduced in second grade. Tomorrow we will continue to work on subtracting using the "trade first" algorithm.
In the future, students will be able to choose any method that works for them to solve subtraction problems. However, for homework tonight, I would like them to use the counting up method to answer questions #1-3 on their Homelinks 2.8.
Here is a link to a video on the Everyday Math website which explains the counting up method. There are also a few YouTube videos which your child may find helpful. You can find those videos by Googling "counting up subtraction."
For tomorrow night's homework, students will answer #4-6 using the trade first algorithm. An explanation of this algorithm can be found on Rachel Clark's website. Here is a link to that explanation:
If your child seems lost, never fear! We will review this method several more times this week and into the future. If you could write me a short note on the homework or shoot me an email, that will help me to know that your child would benefit from some further practice with these methods.