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Decimals and Integers

TermDefinition
Integers whole numbers and their opposites {...,-2, -1, 0, 1, 2, ...}
Whole Numbers 0, 1, 2, 3, ...
Multiplying Integers if the signs are the same ( - and - ) or (+ and +), the product is positive. If the signs are different (+ and -), the product is negative
Dividing Integers if the signs are the same ( - and - ) or (+ and +), the product is positive. If the signs are different (+ and -), the product is negative
Adding Decimals line up the decimals, attach zeroes so all numbers are written to the same place value, then add.
Subtracting Decimals line up the decimals, attach zeroes so all numbers are written to the same place value, then subtract.
Multiplying Decimals multiply normally, ignoring the decimal points. Then, put the decimal point in the answer - the number of decimal places in the answer is the sum of the decimal places in the factors
Dividing Decimals - only the dividend is a decimal bump the decimal up to the quotient bar and divide
Dividing Decimals - the divisor is a decimal move the decimal point over until the divisor is a whole number. Move the decimal point over in the dividend the same number of places and divide.
Created by: Math7