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_______ is heavily used in the electrical, chemical and physics industries.
In maths, substitution is often used to replace an __________ with a number.
An ________ is a statement that two expressions are equal and we are often asked to solve them.
The metric system of measurement has overtaken the ________ system.
There are sixty _______ in an hour, so half an hour is thirty _______.
We can often solve two ____________ equations by looking at them at the same time and trying to eliminate part of them.
In maths, ____________ is often used to replace an expression with a number.
A ________ is something that can change it's value.
We often use the word ______ when we are talking about mass and how heavy something is, but ______ is affected by gravity.
A __________ is a metric unit of length.