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Where does the decimal go? This depends on which operation you are performing: »Addition »Subtraction »Multiplication »Division.

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Presentation on theme: "Where does the decimal go? This depends on which operation you are performing: »Addition »Subtraction »Multiplication »Division."— Presentation transcript:

1 Where does the decimal go? This depends on which operation you are performing: »Addition »Subtraction »Multiplication »Division

2 0 ADDITION = Line up the decimals at the decimal point (Put in any zeroes needed for place holders)  Add the columns, then bring the decimal straight down

3 0 SUBTRACTION = Line up the decimals at the decimal point (Put in any zeroes needed for place holders)  Subtract the columns, then bring the decimal straight down

4 MULTIPLICATION 3.2 x 0.6 = You do NOT need to line up the factors at the decimal point 3.2 Move the decimal that number of spaces X Perform the multiplication steps one row at a time Add a zero for a placeholder in the 2nd row 032 Add the rows together 512 Count the number of digits behind the decimal in the two factors.

5 DIVISION with a decimal in the DIVIDEND ÷ 3 = Write the problem, putting the dividend “inside the cookie jar” Bring the decimal straight UP Perform the division steps as you would even without the decimal

6 DIVISION with a decimal in the DIVISOR ÷.3 = Write the problem, putting the dividend “inside the cookie jar” NOW Bring the decimal straight UP Perform the division steps as you would even without the decimal You need the number in the divisor to be a whole number. MOVE the decimal to the right the number of spaces needed to make it a whole number.. Now you have to move the decimal in the dividend the same number of spaces to the right.


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