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Sagot :
III. Activities
E. Match each English sentence in column A to its corresponding mathematical sentence in column B.
Answers:
11. The sum of three and a number.
- N. 3 + x
12. Four increased by a number.
- K. 4 + x
13. Three more than a number.
- M. x + 3
14. A number added by four.
- O. x + 4
15. The difference of four and a number.
- I. 4 - x
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Translate mathematical sentence into English sentence.
11. 4 + y
- Four increased by a number y.
12. m - 6
- A number m decreased by a six.
13. a + 3b
- A number a increased by thrice a number b.
14. 9t - 5
- Nine multiply or times by t decreased by five.
15. 2x + 7
- Seven increased from twice a number x.
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F. Translate into mathematical sentence.
11. Four less than a certain number.
- x - 4
12. Eight decrease by a number.
- 8 - x
13. 9 more than the product of 5 and r.
- 5r + 9
14. The sum of two and a number x.
- 2 + x
15. Five is greater than the sum of a number and 8.
- (x + 8) + 5
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Algebraic Expression
Definitions:
A numerical expression is an expression that combines numbers and one or more operation symbols.
A variable is any letter or symbol that represents a number. Examples: a, b, c, d, etc.
A constant has a fixed value that does not change. Examples: 2, -1, π, etc.
An algebraic expression is a mathematical phrase that uses variables, numerals, and operation symbols.
Examples
Algebraic Expression:
n - 11 - a number n minus eleven.
2w - two multipled by a number.
x/5 - a number x divided by five.
2a + 6 - six more than twice a number.
m + 3 - the sum of m and 3.
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