Math: Middle School: Grades 6, 7 and 8 Quiz - Algebra - Expressions 1 (Answers)
This Math quiz is called 'Algebra - Expressions 1' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.
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In Algebra, you can think of an expression as one or a number of mathematical symbols that represent a number or quantity. Expressions can contain any number of numbers, letters and symbols.
See how well you can express yourself by playing this quiz on Expressions!
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The correct answer might well be an English expression but it is NOT a mathematical one!
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A letter can be used in place of any number - especially if the number has not yet been worked out
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Let us suppose that a = 3. (5 x 3) + (7 x 3) = 36. This is the same as saying 12 x 3 (12a) = 36
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You must multiply the numbers together AND the letters. Remember a x a = a2
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Here we are adding numbers together, NOT multiplying them together
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Be careful to account for all the a's, then all the b's and then all the c's. In this case + 6c and - 6c cancel each other out and therefore they do not appear in the simplification
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You have two times the number that I have got and 2 times x is the same as 2x
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Don't get baffled by complicated wording - often the answer is easier than you think
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If you got the answer wrong then think carefully through each aspect of the question. Rosie's mother was 28 when Rosie was born. 4 years later, Suzie was born. Suzie is now x years old so Rosie's mother's age is now
28 + 4 + x = 32 + x |