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15 Cards in this Set

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To round to the nearest place value I look at the number to the...
right. If the number to the right is less than 5 then it will stay the same. If the number is 5 or greater I will round up.
True or False?
Decimals represent part of a whole number. Decimals are expressed as tenths, hundredths, thousandths, etc.
True

Ex. 2.98 is read two and ninty-eight hundredths
True or False?
When reading decimals you say "and" for the decimal point, say the number to the right of decimal, and say the place value of the last digit.
True

Ex. 14.652 is read fourteen and six hundred fifty two thousandths
What is most important when adding or subtracting decimals?
Copy problems with decimal points lined up. Whole numbers have an imaginary decimal after them. Add zeros if needed.
What is the rule for reducing fractions to lowest terms?
Divide the top number(numerator) and the bottom number (denominator) by the same number until they can only be divided by one.
True or False?
Sometimes when we add and subtract fractions, denominators are not the same. Denominators MUST be alike when you add and subtract.
True
True or False?
You DO need common denominators to multiply.
False
Just multiply the top numbers, then multiply the bottom numbers. Reduce if necessary.
How do you change a percent to a decimal?
Write the number without the % sign. Move the decimal point 2 places to the LEFT.
Ex. 51%=.51
How do you change a decimal to a percent?
Move the decimal two places to the RIGHT. Add the percent sign.
Ex. .18=18%
What is the Order of Operations?
1. Parentheses
2. Exponents
3. Muliplty and Divide
4. Add and Subtract
True or False?
Absolute Value is how far a number is from zero. Therefore, it is always a positive number.
True
True or False?
Integers are numbers on a number line. Intergers to the right of zero are positive. Intergers to the left of zero are negative. Zero is neither positive or negative.
True
A mathematical sentence that contains an equal sign (=) is an equation. What are letters of the alphabet that are used to replace unknown numbers called?
Variables
True or False?
A RATIO is a way to compare numbers.
True
Ex. 6 apples, 8 oranges
6 to 8, 6:8, 6/8
Same shape, different sizes.
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