1. MATHS BILINGUAL CLASS - 3rd OF ESO
Equations Vocabulary. Definitions
An Activity About Algebraic Expressions
Write the algebraic expression corresponding to each of the following sentences.
1. Twice a certain number plus the triple of the same number.
2. Twice a certain number plus the triple of another number.
3. The triple of a number, plus seven, minus twice another number
4. Four times a number squared, plus twice that number.
5. Eight more than a number, plus ten less than another number.
6. A number increased by 5, plus another number decreased by 9.
7. Twice a number, plus fifteen less than another number.
8. Eight less than twice a certain number.
9. One more than three times a certain number.
10. A certain number, plus its consecutive, minus twelve times another number.
11. Three times the consecutive of a certain number.
12. A certain number, plus four times the consecutive of that number, minus five times the
consecutive of another number.
13. The third part of a certain number, plus one.
14. Half a certain number squared, minus twice another number.
15. One thousand times a number plus another number cubed .
Answers 9. 3x1
1. 2x3x 10. x x1−12y
2. 2x3y 11. 3 x 1
3. 3x7−2y OR 3 x 7−2y 12. x4 x1−5 y1
4. 4x 22x OR 4x 22x x x1
13. OR
5. 8x y−10 3 3
2 2
6. x5 y−9 x x
14. −2y OR   −2y
7. 2x y−15 OR 2  x y−15 2 2
8. 2x−8 15. 1,000 x y OR 1,000 x y 3
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