Adding, Subtracting, Multiplying and Dividing Decimals
Steps to Add
\ Addition
2
1.
Write down numbers, one underi
the other so the Decimal Points
Line Up
Find the sum:
: 2.45 + 12.763
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1.
Write down numbers, one under ;
the other so the Decimal Points Line !
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:
1.35 - 0.728
2.
Put in zeros so the numbers have
the same length.
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3.
Drop the Decimal Point straight
down into the answer and Add.
3.
Drop the Decimal Point straight j
down into the answer and Subtract.
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Steps to Multiply
Multiplication
\ Find the Product:
I
Find the difference:
1.
Ignore the Decimal Point.
Multiply Normally
3.1 • 2.5
Ş bivision
Steps to Divide
! Find the Quotient:
1.
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2.
Move the decimal point to the right
to make the divisor (b) a whole
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number. Move the decimal the same ;
amount of spaces to the right in the
dividend (a).
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3.
Starting at the right of your
answer, move that many decimal
places to the left and place the
decimal point
4
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a+b = b)a = —
7.28 - 1.3
2.
Count how many decimal places
the two original numbers have
combined.
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2.
Put in zeros so the numbers
have the same length.
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Steps to Subtract
i Subtraction
3.
Put the Decimal Point in the
answer directly above the dividend (a)
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4.
Divide Normally using Long
Division
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Adding, Subtracting, Multiplying and Dividing Decimals
Addition
Find the sum:
2.45 + 12.763
Steps to Add
1.
Write down numbers, one under
the other so the Decimal Points
Line Up
2.
Put in zeros so the numbers
have the same length.
3.
Drop the Decimal Point straight
down into the answer and Add.
Steps to Subtract
Subtraction
Find the difference:
1.35 - 0.728
Oq
ł.3510
_ 0-1 2 8
1.
Write down numbers, one under
the other so the Decimal Points Line
Up
2.
Put in zeros so the numbers have
the same length.
3.
Drop the Decimal Point straight
down into tire answer and Subtract.
I
4
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ë
23
Multiplication
Find the Product:
3.1 • 2.5
Steps to Multiply
1.
Ignore the Decimal Point.
Multiply Normally
bivision
Steps to Divide
Find the Quotient:
1.
7.28 4-1.3
2.
Count how many decimal places
the two original numbers have
combined.
a+b = b)a = 2
2.
Move the decimal point to the right
to make the divisor (b) a whole
number. Move the decimal the same
amount of spaces to the right in the
dividend (a).
3.
Starting at the right of your
answer, move that many decimal
places to the left and place the
decimal point
3.
Put the Decimal Point in the
answer directly above the dividend (a)
78
4.
Divide Normally using Long
Division
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