# Birthday Treat

Purpose

This is a level 4 number activity from the Figure It Out series. It relates to Stage 7 of the Number Framework.
A PDF of the student activity is included.

Achievement Objectives
NA4-1: Use a range of multiplicative strategies when operating on whole numbers.
NA4-1: Use a range of multiplicative strategies when operating on whole numbers.
NA4-1: Use a range of multiplicative strategies when operating on whole numbers.
Student Activity

Click on the image to enlarge it. Click again to close. Download PDF (755 KB)

Specific Learning Outcomes

sovle problems involving addition, subtraction, multiplication and division of money

Required Resource Materials
FIO, Link, Number Sense, Book One, Birthday Treat, page 21
Activity

This activity uses a context that should appeal to students in this age group and should thus encourage them to develop their number problem-solving strategies further.
If the students make an error in question 1, it will have a carry-over effect to the following questions. Have the students report their solutions for question 1 and resolve any difficulties before they continue with the next question. Take the opportunity to see if the students can find the multiplicative relationship between
the \$5.50 cost for the movie and the \$55 total. This is a “10 times larger” relationship, and as there are 5 boys, the movies will take half of the \$55, leaving half for food.
Another way of looking at this is to see that if there is \$55 for 5 boys, each boy could have \$11; that is, \$5.50 for the movies and \$5.50 for food.
After the students have answered question 4, you might like to encourage them to develop some new types of burgers to add to the Burger Planet menu, along with different prices. They could use these new burgers to work out different options for the 5 boys.

#### Answers to Activity

1. \$27.50
2. \$5.50
3. a. Earth meal: \$5.00; mega moon meal: \$5.30; super saturn meal: \$5.90
b. Super saturn meal, no upgrade
4. Answers will vary. Two possible answers are:
earth meal upgrade \$5.00
mega moon meal \$4.80
mega moon meal upgrade \$5.30
super saturn meal \$5.40
super saturn meal upgrade \$5.90
Total: \$26.40
Change: \$1.10
or
earth meal upgrade \$5.00
two earth burgers, large liquid fuel \$5.00
mega moon meal upgrade \$5.30
super saturn meal \$5.40
two super saturn burgers and
one medium chip booster \$6.80
Total: \$27.50
Change: 0.00

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