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15 Cards in this Set
- Front
- Back
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To round to the nearest place value I look at the number to the...
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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.
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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 |
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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 |
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What is most important when adding or subtracting decimals?
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Copy problems with decimal points lined up. Whole numbers have an imaginary decimal after them. Add zeros if needed.
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What is the rule for reducing fractions to lowest terms?
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Divide the top number(numerator) and the bottom number (denominator) by the same number until they can only be divided by one.
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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
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True or False?
You DO need common denominators to multiply. |
False
Just multiply the top numbers, then multiply the bottom numbers. Reduce if necessary. |
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How do you change a percent to a decimal?
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Write the number without the % sign. Move the decimal point 2 places to the LEFT.
Ex. 51%=.51 |
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How do you change a decimal to a percent?
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Move the decimal two places to the RIGHT. Add the percent sign.
Ex. .18=18% |
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What is the Order of Operations?
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1. Parentheses
2. Exponents 3. Muliplty and Divide 4. Add and Subtract |
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True or False?
Absolute Value is how far a number is from zero. Therefore, it is always a positive number. |
True
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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
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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?
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Variables
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True or False?
A RATIO is a way to compare numbers. |
True
Ex. 6 apples, 8 oranges 6 to 8, 6:8, 6/8 |
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Same shape, different sizes.
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Similar
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