## Welcome to H3 Maths

Blog Support for Growing Mathematicians

## Posts tagged with New Zealand

### How to fix decline in Math Scores

May5

Recent data released in New Zealand paints an alarming picture of decline in Mathematics scores for Primary School leavers. These students then enter High School without the math skills to succeed. Here are some of the results: “Maths scores have been declining since 2002, according to OECD data. National Standards figures show a slight climb […]

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### Data Display – Migration after Christchurch Earthquakes

February23

The New Zealand Herald has surveyed the migration patterns following the severe earthquakes in Christchurch a year ago. The use of percentages, a pie graph and Migration Map with flow lines illustrates different data displays. Each has its strengths and weaknesses. Click on the map to read each migration story as this brings the data […]

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#### Post Support

10 x 9 x 8 + (7 + 6) x 5 x 4 x (3 + 2) x 1 = 2020

NCEA Level 2 Algebra Problem. Using the information given, the shaded area = 9, that is:
y(y-8) = 9 –> y.y – 8y – 9 =0
–> (y-9)(y+1) = 0, therefore y = 9 (can’t have a distance of – 1 for the other solution for y)
Using the top and bottom of the rectangle,
x = (y-8)(y+2) = (9-8)(9+2) = 11
but, the left side = (x-4) = 11-4 = 7, but rhs = y+? = 9+?, which is greater than the value of the opp. side??
[I think that the left had side was a mistake and should have read (x+4)?]