Rearrange Formulae

Rerrange the Order of Operations

• Brackets

• Addition & Subtraction

• Indices

• Multiplication

• Division

Instructions on a bottle of plant food say to mix plant food (p) and water (W) using the formula W = 10p. If Harry uses 500 ml of water, he should use ____ ml of plant food.

The formula for the amount of pocket money (M) in pence that Peter gets each week is M = 25a + 75, where a is Peter's age in years. When Peter is 11 years old, he gets ____ pence pocket money each week.

The length of one side of the regular pentagon is y. If the pentagon has a perimeter of 35 cm, the value of y is ____ cm.

The image shows a dodecagon drawn on a straight line. The formula shows how to find the size of an angle inside a regular polygon (a), where n is the number of its sides. The size of angle b is ____°.

• y

• m

• x

• c

• A

• r

• S

• D

• T

• C

• d