Scaling Up

Purpose

This is a level 2 algebra activity from the Figure It Out theme series.
A PDF of the student activity is included.

Achievement Objectives
NA2-8: Find rules for the next member in a sequential pattern.
Student Activity

Click on the image to enlarge it. Click again to close. Download PDF (481 KB)

Specific Learning Outcomes

continue a sequential pattern

Required Resource Materials
FIO, Level 2-3, Theme: Under the Sea, Scaling Up, page 15

Sqaure tiles

Activity

There are many ways that students can count the number of square tiles in each fish. Most will use one-by-one counting if you do not encourage them to explore other interesting ways to count.

Methods might include:
• using symmetry:

symmetry.

There are four tiles on this line of symmetry;
2 x 5 = 10 tiles are not on the line of symmetry.
Total: 10 + 4 = 14 tiles.

• using composite blocks:
composite block.

4 + 4 + 6 = 14 tiles
• multiplication:

multiplication fish.

(3 x 3) + 3 + 2 = 14 tiles (or 4 x 3 + 2)

• using the larger enclosing square and noting the missing and additional tiles:
fish.

 (4 x 4) + 2 – 4 = 14 tiles
Students should try to use equal additions or multiplication to simplify the task of counting the scales (square tiles). A table using multiplication is illustrated in the Answers section.
A grandparent fish will build on the pattern of body, fins, and tail shown in the other fish.

fish.

fish.
The total number of scales on a grandparent fish is 25 + 6 + 6 + 10 = 47.

Answers to Activity

1. Baby fish have 5 scales, teenage fish have 14 scales, and adult fish have 28 scales.
2. There are 137 scales. Students could work this out in a table using multiplication:
table.

3.

fish.

 

Attachments
ScalingUp.pdf480.08 KB

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