Chapter 11

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• Middelbare school
• vwo
• Leerjaar 1

Formulas and equations

Chapter 11

What do you remember
about chapter 11?

What is the shortened version of
amount = 5 x subject + 3

How do we write 4 x t?

1. 4t
2. t4
3. 4 x t

What are the terms in the formula
G = 5h + 20

1. G and 5h
2. 20 and G
3. 5h and 20
4. 5h

Like terms

4a and 3a same variable

Terms with same variable are like terms

Shorten the formula:
L = 5r - 3s + 2r + s

What is the shortest version of
K = 3g + 5m - 2g + 4m

1. K = 5g + 9m
2. K = 1g + 9m
3. K = 1g + 1m
4. K = g + 9m

• multiplication sign often left out
•  order of operations?

Calculating the results of a formula

w = 5k - 4

k = 3

1.  replace k with 3
2.  w = 5 x 3 - 4
3. calculate w

What is w when k is 3
w = 5k - 4

z = 7 + 3(f - 6)
Write down the steps and calculate what z is when f is 2

Calculate the unknown value

t = 124
t = 4r - 12
What is r? Show your steps

36 + 8h - 12 = 56

36 + ... - 12 = 56

8h = ?

h = ?

Do you have any questions?

Extra exercises

Make question E3, E6 or E7