Multiplicative Thinking, Level 3
Buttons Galore
t o ns
t
u
B
on
i
p
m
a
h
C
Activity
ws is the world
Matthe
a
d
l
i
t
Ma
ttons-in-the-jar
pion bu
cham
w does she do it?
ser. Ho
s
e
u
g
Matilda, “basically,
l,” says
l
e
W
“
top layer in the
k at the
I loo
ate the number
m
ti
nd es
jar a
1.
Use Matilda’s strategy to estimate the
number of buttons in these jars.
a.
-in-the-jar Guess
e
of buttons in that layer. Then
I estimate how many layers of
buttons there are. I multiply
the number of buttons in the
top layer by the number of layers
I think there are.”
2.
Would Matilda’s strategy work with
the mixture of shells in this jar?
Explain your answer.
b.
Rectangular base
c.
Triangular base
d.
Rectangular base
Circular base
18
r ...
Using multiplication to solve capacity problems