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Is it reasonable? If you made a mistake somewhere, chances are your answer will not just be a little bit off, but will be completely ridiculous. 54 Chapter 3: Word Problems WORDS FOR OPERATIONS Note: The English language is notoriously imprecise, and these suggested translations should be taken only as a guide, not as absolutes. minus difference between from Subtraction less less than fewer than decreased by take away plus and added to Addition greater than more than increased by total sum of times product at Multiplication double, triple, etc.

This will not change the result of the division, because division is the same thing as fractions, and multiplying both the numerator and denominator of a fraction by the same number will not change the value of the fraction. 4 , obtained by multiplying the numerator and denominator by 10. 160 0 PERCENTS Percent means “per hundred”, so x% = • x , or x hundredths. 100 A percent is just a fraction However, it is a fraction with a denominator of 100, not just any fraction. When we write the percent, we are just writing the numerator of the fraction.

The rectangular coordinate system is based on a grid, and every point on the plane can be identified by unique x and y coordinates, just as any point on the Earth can be identified by giving its latitude and longitude. AXES Locations on the grid are measured relative to a fixed point, called the origin, and are measured according to the distance along a pair of axes. The x and y axes are just like the number line, with positive distances to the right and negative to the left in the case of the x axis, and positive distances measured upwards and negative down for the y axis.

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