Exercise 5.1 - Pronumerals and Variables
Another word for add.
What is the sum, total, plus, altogether etc.?
A number added to three equals seven.
What is an equation?
When x=4,
y = x + 8
What is y=12?
The cost to buy 7 fish (f),
C = 5f + 2
What is $37?
Describes an unknown number if its value may change.
What is a variable?
e, f and q in 3e2+4ef - 2g.
What are the variables in this expression?
In words,
y = x - 18
What is 'to find y, subtract 18 from x'?
The distance of fence (d) that can be built with 20 pieces of timber (t) is given by the formula:
d = 3t - 6 metres
What is a distance of 54m?
Another way to say divide.
What is the quotient, share equally, how many, split into etc.?
The number 4 in 2e2 + 4e + 3.
What is the coefficient of e?
When v = -2
w = v + 2
What is w=0?
The length of hair (h) that can be grown in 10 years (y) can be found using the formula:
h = 20y - 4 centimetres
What is hair length of 196cm?
Letters or symbols used for numbers with values that you don't know or that may change.
What is a pronumeral?
The number 4 in 4g2+5g - 6.
What is the coefficient of g2?
In words,
y = 18 - x
2
What is 'to find y, subtract a number from 18, then divide the result by 2'?
The cost (c) of dinner for 6 people (p) can be found using the formula:
C = $8p + 2
The product of e, f and 7.
What is 7ef?
The number -7 in e2+4e - 7.
What is the constant value?
When v = 3,
w = v2 + 2
What is w = 11?
x 1 2 3 4 5 6
y 10 14 18 22 26 30
y = something 4x + ?
What is +6?