Reshaping Cuboids - Sharp EL-531RH Teachers Manual

Reshaping Cuboids

• • • • • • • • • • • • • • • • • • • • • 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 • • • • • • • • • • • • • •
12 cubes, each with a volume of 1 cm
having a volume of 12 cm
Find the equivalent equations for each of the cuboids; for example,
1 x 1 x 12 = 12, 2 x 2 x 3 = 12, etc.
• • • • • • • • • • • • • • • • • Using the calculator • • • • • • • • • • • • • • • • •
Calculator functions used: Multiplication, Multi-line Playback
Press the following buttons and then start operation.
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
2 2
1 3
Each press of a
Display the first calcualtion
with
3
, may be placed together to create any of four cuboids, each
3
.
12
3
4 etc.
key takes you one calculation step forward or backward.
1X1X12=
2X2X3=
1X3X4=
1X1X12=
2X2X3=
1X3X4=
24
Junior high school
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