Before you practice the work from this chapter, take some time to go over how we were able to use place value columns to set up a vertical algorithm. This is useful to solve and problems, instead of using:
place value models
partitioning to break our numbers up
We also looked at how to use a vertical algorithm to solve or where we needed to regroup our numbers.
We also saw a mix of , where we may, or may not, need to do some regrouping.
Find the value of 150 + 250.
Find the value of 6754 - 939.
Find the value of 7215 + 7039.
uses mental and written strategies for addition and subtraction involving two-, three-, four and five-digit numbers