Maths, E-portfolio Sample, Term 4 2018

Maths, E-portfolio Sample

1. Use two different strategies to solve the following problem:

To get a ‘Great Achievement” award, Rob needs to swim 94 lengths of the swimming pool.
If he has already swum 69 lengths, how many more lengths of the swimming pool does he
need to swim to get his award?

Strategy One is called Tidy number                                   Answer: 25

94-69
90-70=24
24+1=25

Strategy Two is called Place value                                     Answer: 25

94-69
94-60=34
34-9=25

The KNOWLEDGE I needed to solve this problem included knowing if the question was + - x
or ➗.I had to know how to subtract large numbers. I also had to know how to use the strategies well, and prior knowledge.

2. Use two different strategies to solve the following problem:

A netball team enters a tournament. The tournament costs $16 per person. If there are 9
people in the team, how much will the team pay in total?

Strategy One is called Tidy number                                   Answer: $144

16x9
20x9=180
4x9=36
180-36=144

Strategy Two is called Place value                                     Answer: $144

16x9
10x9=90
6x9=54
90+54=144

The KNOWLEDGE I needed to solve this problem included knowing if the question was + - x or ➗. I had to know how to work out my x tables. I had to know my x tables well. I also had to know what to do with both strategies.

3. Use two different strategies to solve the following problem:

Ye Lin is helping clean up her local beach. She and her classmates collect 24 bags of rubbish
in total. 8 of the bags are filled with only plastic. What fraction of the total number of filled bags
is this?

Strategy One is called Prior knowledge                      Answer: 3

24 ➗8=3

Strategy Two is called Division                                   Answer: 3

8 ➗1=8
8 ➗2=16
8 ➗3=24

The KNOWLEDGE I needed to solve this problem included knowing if the question was + - x or ➗. I had to know how to do ➗. I had to know my prior knowledge.