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Level Three > Number and Algebra

Fish Forms

Keywords:
Purpose: 

This is a level 3 number and algebra activity from the Figure It Out theme series.

Achievement Objectives:

Achievement Objective: Use a range of additive and simple multiplicative strategies with whole numbers, fractions, decimals, and percentages.
Achievement Objective: Connect members of sequential patterns with their ordinal position and use tables, graphs, and diagrams to find relationships between successive elements of number and spatial patterns.

Specific Learning Outcomes: 

use mental strategies to add numbers

Required Resource Materials: 
FIO, Level 2-3, Theme: Under the Sea, Fish Forms, page 14
Activity: 

Encourage the students to use systematic counting when calculating the cost of the sea creatures. This will involve looking for common shapes and using multiplication rather than shape-by-shape counting. For example, consider this shape:
shape.
Question 3 involves students applying the relationship between the number of trapezia in the body of the sea serpent and the total cost of the creature.
A five-trapezia-bodied serpent costs:
diagram.
Adding five more trapezia will cost another 75c (5 x 15c), which gives a total cost of $2.10.
This can be organised in a table to check (60c + [number of trapezia x 15c]).

table.

Answers to Activity

1. a. 90c
b. 90c
2. $1.35
3. $2.10
4. Answers will vary.


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