This is an awesomely effective activity to teach the
foundation of subtraction using base ten blocks. The students
do not just learn the process of the algorithm. They use the manipulatives and learn to make the correct exchanges. In my experience, students are excited when they actually begin to understand the process behind regrouping subtraction. As a
teacher, I am always excited when I see
the light go on as the student begins to “get it”!
This download includes two identical slides of
each explanation. One is more appropriate for
display on projector or activboard. The other
page is better for printing. There are explanations
with two digit, as well as three digit subtraction.
The algorithm and the base ten manipulative
process is explained for each. The download also
includes manipulatives and a workmat to practice the