24
Reshaping Cuboids
Junior high school
• • • • • • • • • • • • • • • • • • • • • Objective • • • • • • • • • • • • • • • • • • • • •
Reinforce students’ understanding of the equivalence of shapes in various alignments and how this
relates to multiplication within a practical context.
Develop mental skills involving factors, divisors, and systematic thinking.
• • • • • • • • • • • • • • • Explanation of the activity • • • • • • • • • • • • • •
1
2 cubes, each with a volume of
1
cm
3
, may be placed together to create any of four cuboids, each
having a volume of
1
2 cm
3
.
Find the equivalent equations for each of the cuboids; for example,
1
x
1
x
1
2 =
1
2, 2 x 2 x 3 =
1
2, etc.
• • • • • • • • • • • • • • • • • Using the calculator • • • • • • • • • • • • • • • • •
Calculator functions used: Multiplication, Multi-line Playback
Introduce students to the calculator’s Multi-line playback feature, which will be useful to
display sets of solutions for each “volume” number.
1
1
1
2
2
2
3
1
3
4
etc.
Press the following buttons and then start operation.
1X3X4=
DEG
2X2X3=
DEG
1X1X12=
DEG
1X3X4=
DEG
2X2X3=
DEG
1X1X12=
DEG
Each press of a
key takes you one calculation step forward or backward.
Display the first calcualtion
with
Summary of Contents for EL-531RH
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