User Guide
Arrange the class in two teams. Display a transparency so only one circle
you have traced can be seen. In turn, players from each team can guess
which size piece can be used to cover the fractional part of the circle.
Then, try using the pieces to cover the shape. The team that covers and
names a fractional part correctly scores a point. If an attempt is unsuccessful,
the other team can try. When all circles have been
covered and named, the team with most points wins.
Adding and Subtracting Fractions
On the overhead, arrange and on the
whole circle. Ask students to, “Estimate what part of
the whole circle these pieces cover.”
(Answer:
or .) How could we find out?
Explore the children’s suggestions.
You may want to lead children to try exchanging pieces so all parts are
the same size and can be counted.
Continue adding fractional parts such as
and
,
and , and ,
and
and
and
. Younger children can draw pictures to record their
responses. Show older children how to compute the addition
using the symbols.
Next, place
on the overhead. Say, “I have
of a circle. How
could I give
of this circle away?” Explore the children’s suggestions, and if
necessary, lead them to exchange
for
. Then
can be removed with
remaining. Continue with other subtraction situations including
-
,
1
-
,
and
-
. (Help students recognize that both the third pieces need to
be traded for sixths, so the remaining pieces can be counted.)
LRM0618-TG
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CAUTION: Not for children under 3 years old.
Small parts may present a choking hazard.
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