The Price is Right Mae’r Pris yn Iawn

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Presentation transcript:

The Price is Right Mae’r Pris yn Iawn Starter Task (10 mins) – Individual work then answers as whole class. Practice and review calculating percentages mentally. http://www.transum.org/Software/SW/Starter_of_the_day/starter_September29.ASP

How much money do you save and what is the sale price? The Price is Right Mae’r Pris yn Iawn How much money do you save and what is the sale price? Saving: 29% of £269.99 = £78.30 Sale price: £269.99 - £78.30 = £191.69 Real life question to think about decreasing by a specified percentage

MLO: Learn to calculate percentage increase and decrease quickly. The Price is Right Mae’r Pris yn Iawn MLO: Learn to calculate percentage increase and decrease quickly. MLO

The Price is Right Mae’r Pris yn Iawn In groups, investigate which calculation is correct. Explain why the calculation works. Investigation into multipliers when increasing by a percent. Encourage learners to think about where the ‘1.23’ has come from once they have identified the correct calculation.

The Price is Right Mae’r Pris yn Iawn In groups, investigate which calculation is correct. Explain why the calculation works. Investigation into multipliers when decreasing by a percent. Encourage learners to think about where the ‘0.77’ has come from once they have identified the correct calculation.

The Price is Right Mae’r Pris yn Iawn practice

The Price is Right Mae’r Pris yn Iawn practice

The Price is Right Mae’r Pris yn Iawn TASK: Match the worded explanation to the decimal multiplier. EXT: Match the fractional multiplier to your pairs. Matching task to embed the learning. Extension – using fractional equivalences to the decimal multipliers.

Answers: The Price is Right Mae’r Pris yn Iawn Quick summary of answers for assessment and reflection purposes.

Does this always happen? Research this for next lesson. The Price is Right Mae’r Pris yn Iawn Which would you prefer? 80% of £20 20% of £80 Plenary to encourage further thought about the way we calculate percentages. Does this always happen? Research this for next lesson.