Introductory algebra and equations

6. Make an expression or equation easier to understand. (8)
9. Something which divides into all terms. (6,6)
10. A number, variable or combination of numbers and variables separated by plus or minus signs. (4)
11. Something with a fixed value that doesn't change. (8)
13. A subject in maths involving rearranging and solving equations. (7)
14. Multiply out all the factors. (14)
16. A group of numbers and letters joined by operations without an equals sign. (10)
17. Two expressions joined by a relation symbol, for example x < y. (10)
18. This law tells us how to expand brackets or factorise and that this doesn't change the answer. (12)
21. Put a particular value for a variable into an equation. (10)
22. An equation where the variables are not multiplied or squared but only occur one at a time. (6,8)
24. This law tells us that we can swap the order of terms in sums or products. (11)
25. Move about an equation without changing it's meaning or values. (9)

1. A special equation that can be used to solve problems, for example find the circumference of a circle. (7)
2. A variable which is by itself on one side of an equation so that we can use the equation as a formula for finding that variable. (7)
3. Something we don't know the value of. (7)
4. A group of numbers and variables with exactly the same variables as another group. (4,4)
5. Powers, such as squared or cubed. (7)
7. Pull out all the common factors of an expression. (9)
8. A pair of expressions linked by an equals sign. (8)
9. Gather together groups of numbers and letters which are the same. (7,4,5)
12. A term which can divide into another term. (6)
15. This law tells us that we can group sums or products however we find it easiest. (11)
19. Two expressions which are the same. (5)
20. Something shown with letters which can have different values. (8)
23. An equation that is true for any possible values of the variables (letters). (8)