Before you practice the work from this chapter, take some time to go over some of the and strategies and problems we've looked at. These include:
using a number line
modelling with place value (base ten) blocks
partitioning numbers by place value
using a vertical algorithm
We also looked at how to use a vertical algorithm to solve or This strategy is useful if we need to trade, or regroup. For addition, we but for subtraction, we
Find the value of 796 - 429.
Find the value of 7681 + 9273.
Find the value of 55\,872-2619.
Select and apply efficient mental and written strategies and appropriate digital technologies to solve problems involving all four operations with whole numbers and make estimates for these computations