1. Substitution Literacy Skills Practice Research Memory Stretch F U O M
Can you unscramble this set of letters?
Describe the word you unscramble!
Write out an explanation for what substitution ‘is’.
Skills Practice
If 𝑎=3, work out these expressions. F U O M L R A 2𝑎
𝑎+4
𝑎+𝑎
𝑎−3
𝑎×𝑎
𝑎÷𝑎 5𝑎
4𝑎+1
If 𝑥=2 and 𝑦=4, work out these expressions. 2𝑥
𝑦+4
𝑥+𝑦
𝑦−𝑥
𝑥×𝑦
𝑦÷𝑥
5𝑥+2𝑦
𝑥+1+𝑦
Research
Research and find a formula that you find interesting.
Write what you interests you about the formula!
The cost of a phone call is 𝐶 pence which is calculated using the formula 𝐶=20+5𝑚, where 𝑚 is the number of minutes the phone call lasted. Find the value of 𝐶 when
𝑚=1
𝑚=5
𝑚=12
The number of cakes bought for a birthday party depends on the number of boys, 𝐵, and the number of girls, 𝐺. If 𝑛=2(3𝐵+2𝐺), find 𝑛 when
𝐵=4, 𝐺=2
𝐵=3, 𝐺=2
𝐵=0, 𝐺=5
Memory
Remember substitution involves replacing the representative letter with a number!
Stretch
The USA measures temperature in °F. Europe uses °C. You can change °F to °C using the formula 𝐶= 5 9 𝐹−32 .
Convert 212 °F and 32 °F to °C. What is special about these two temperatures?