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Year 9

Agricultural worker (crops)

I can understand how maths is used by agricultural workers (crops).

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Year 9

Agricultural worker (crops)

I can understand how maths is used by agricultural workers (crops).

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Lesson details

Key learning points

  1. Conversions are often used
  2. Estimation can be used to help calculate a likely crop yield

Keywords

  • Area - The area is the size of the surface and states the number of unit squares needed to completely cover that surface.

  • Estimate - A quick estimate for a calculation is obtained from using approximate values, often rounded to 1 significant figure.

  • Mean - The (arithmetic) mean for a set of numerical data is the sum of the values divided by the number of values. It is a measure of central tendency representing the average of the values.

Common misconception

Confusing unfamiliar units of measure.

Pupils may benefit from having two lists of metric and imperial measures to reference should they need to.


To help you plan your year 9 maths lesson on: Agricultural worker (crops), download all teaching resources for free and adapt to suit your pupils' needs...

The values used in this lesson were suggested from various agricultural websites. You may wish pupils to invesitgate and find their own values, for example using the current conversion rate for pounds and dollars.
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Licence

This content is © Oak National Academy Limited (2025), licensed on Open Government Licence version 3.0 except where otherwise stated. See Oak's terms & conditions (Collection 2).

Lesson video

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6 Questions

Q1.
A quick for a calculation is obtained from using approximate values, often rounded to 1 significant figure.
Correct Answer: estimate
Q2.
The (arithmetic) mean for a set of data is the sum of the values divided by the number of values.
Correct Answer: numerical
Q3.
The mean is a measure of central tendency representing the of the values.
Correct Answer: average
Q4.
Convert 21.3 cm into mm.
2.13 mm
Correct answer: 213 mm
2130 mm
21 300 mm
Q5.
Convert 21.3 cm into m.
2130 m
213 m
2.13 m
Correct answer: 0.213 m
Q6.
Convert 21.3 cm into km.
Correct answer: 0.000213 km
0.0213 km
2130 km
2 130 000 km

6 Questions

Q1.
Given that 1 acre $$\approx$$ 4046.86 m$$^2$$, convert 1.7 acres into square metres.
Correct Answer: 6879.662
Q2.
Given that 1 acre $$\approx$$ 4046.86 m$$^2$$, convert 12.4 acres into square metres.
Correct Answer: 50 181.064
Q3.
Given that 1 acre $$\approx$$ 4046.86 m$$^2$$, convert 246 858.46 square metres into acres.
Correct Answer: 61
Q4.
It is better to sell crops within your own country.
Always true - you will always get the best price.
Correct answer: Sometimes true - it depends on the exchange rate.
Always false - you may get a better price elsewhere.
Q5.
Calculate the mean of the following values: 552, 547, 585, 578, 538
Correct Answer: 560
Q6.
Calculate the mean of the following values: 37, 41, 47, 50, 40, 52, 46, 54, 48, 55
Correct Answer: 47