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Unit 2 Vocabulary

AB
base, A number that is raised to a power. For example, in 5³, the base is 5
dividendThe number in division that is being divided. In 35 ÷ 7 = 5, the dividend is 35.
divisorThe number that divides another number. For example, in 35 ÷ 5 = 7, the divisor is 5.
expanded notationA way of writing a number as the sum of the values of each digit. For example, in expanded notation, 356 is written as 300 + 50 + 6.
exponentA small raised number used in exponential notation to tell how many times the base is used as a factor. For example, in 5³, the exponent is 3.
exponential notationA way to show repeated multiplication by the same factor. For example, 2³ is exponential notation for 2 * 2 * 2.
factoreach of the 2 or more numbers in a product
number-and-word notationA way of writing a number using a combination of numbers and words. Example, 27 billion is number-and-word notation for 27,000,000,000.
partial-quotients method, a way to divide in which the dividend is divided in a series of steps.
power of 10A whole number that can be written as a product of 10’s example, 100 is equal to 10 *10, or 102
preciseExact or accurate. The smaller the unit or fraction of a unit used in measuring, the more precise the measurement is.
quotientThe result of dividing one number by another number. Example: in 35 ÷ 5 = 7, the quotient is 7.
remainderAn amount left over when one number is divided by another number.
scientific notationA system for writing numbers in which a number is written as the product of a power of 10 and a number that is at least 1 and less than 10. Example 4 * 1012 is scientific notation for 4,000,000,000,000.
standard notationThe most familiar way of representing whole numbers, integers, and decimals. Example, standard notation for three hundred fifty-six is 356.
truncateIn a decimal, two cut off all digits after the decimal point, or after a particular place to the right of the decimal point. Also called rounding down


Janine Lehr

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