Add and Subtract Decimals 1

Topics

Pre - Algebra

Decimals

Add and Subtract Decimals

Add and Subtract Decimals 1

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Question 1 of 5

1. Question
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$4.27+11.634+0.32$
- (16.224)
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First, line up the decimal points (point over point).

If there are any blank values to the right of the decimal point, write $0$ .

$4$ $.$ $2$ $7$ $0$

$+$ $1$ $1$ $.$ $6$ $3$ $4$

$+$ $0$ $.$ $3$ $2$ $0$

Add as you would whole numbers

Carry Overs $1$ $1$

$+$ $4$ $.$ $2$ $7$ $0$

$+$ $1$ $1$ $.$ $6$ $3$ $4$

$+$ $0$ $.$ $3$ $2$ $0$

$1$ $6$ $.$ $2$ $2$ $4$

The sum is $16.224$

$16.224$
Question 2 of 5

2. Question
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$7980.2+3.006+55.701$
- (8038.907)
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First, line up the decimal points (point over point).

If there are any blank values to the right of the decimal point, write $0$ .

$7$ $9$ $8$ $0$ $.$ $2$ $0$ $0$

$+$ $3$ $.$ $0$ $0$ $6$

$+$ $5$ $5$ $.$ $7$ $0$ $1$

Add as you would whole numbers

Carry Overs $1$ $1$

$+$ $7$ $9$ $8$ $0$ $.$ $2$ $0$ $0$

$+$ $3$ $.$ $0$ $0$ $6$

$+$ $5$ $5$ $.$ $7$ $0$ $1$

$8$ $0$ $3$ $8$ $.$ $9$ $0$ $7$

The sum is $8038.907$

$8038.907$
Question 3 of 5

3. Question
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$0.019+537.4+20.72$
- (558.139)
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First, line up the decimal points (point over point).

If there are any blank values to the right of the decimal point, write $0$ .

$0$ $.$ $0$ $1$ $9$

$+$ $5$ $3$ $7$ $.$ $4$ $0$ $0$

$+$ $2$ $0$ $.$ $7$ $2$ $0$

Add as you would whole numbers

Carry Overs $1$

$+$ $0$ $.$ $0$ $1$ $9$

$+$ $5$ $3$ $7$ $.$ $4$ $0$ $0$

$+$ $2$ $0$ $.$ $7$ $2$ $0$

$5$ $5$ $8$ $.$ $1$ $3$ $9$

The sum is $558.139$

$558.139$
Question 4 of 5

4. Question
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$9-0.04$
- (8.96)
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First, line up the decimal points (point over point).

If there are any blank values to the right of the decimal point, write $0$ .

$9$ $.$ $0$ $0$

$-$ $0$ $.$ $0$ $4$

Subtract as you would whole numbers

Since $0$ is less than $4$ we will use borrowing to subtract

$0$ (tenths digit) $=$ borrow $1$ from $9$

$0$ (hundredths digit) $=$ borrow $1$ from $10$ (tenths digit)

$9$

$8$ $10$ $10$

$9$ $.$ $0$ $0$

$-$ $0$ $.$ $0$ $4$

$8$ $.$ $9$ $6$

The difference is $8.96$

$8.96$
Question 5 of 5

5. Question
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$2.1-1.091$
- (1.009)
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First, line up the decimal points (point over point).

If there are any blank values to the right of the decimal point, write $0$ .

$2$ $.$ $1$ $0$ $0$

$-$ $1$ $.$ $0$ $9$ $1$

Subtract as you would whole numbers

Since $0$ is less than $9$ and $1$ we will use borrowing to subtract

$0$ (hundredths digit) $=$ borrow $1$ from $1$

$0$ (thousandths digit) $=$ borrow $1$ from $10$ (hundredths digit)

$9$

$0$ $10$ $10$

$2$ $.$ $1$ $0$ $0$

$-$ $1$ $.$ $0$ $9$ $1$

$1$ $.$ $0$ $0$ $9$

The difference is $1.009$

$1.009$

Add and Subtract Decimals 1

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Quiz summary

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1. Question

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2. Question

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3. Question

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4. Question

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5. Question

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Quizzes

Carry Overs		$1$		$1$
$+$		$4$	$.$	$2$	$7$	$0$
$+$	$1$	$1$	$.$	$6$	$3$	$4$
$+$		$0$	$.$	$3$	$2$	$0$
	$1$	$6$	$.$	$2$	$2$	$4$

	$7$	$9$	$8$	$0$	$.$	$2$	$0$	$0$
$+$				$3$	$.$	$0$	$0$	$6$
$+$			$5$	$5$	$.$	$7$	$0$	$1$

			$0$	$.$	$0$	$1$	$9$
$+$	$5$	$3$	$7$	$.$	$4$	$0$	$0$
$+$		$2$	$0$	$.$	$7$	$2$	$0$

				$9$
			$0$	$10$	$10$
	$2$	$.$	$1$	$0$	$0$
$-$	$1$	$.$	$0$	$9$	$1$
	$1$	$.$	$0$	$0$	$9$

	$7$	$9$	$8$	$0$	$.$	$2$	$0$	$0$
$+$				$3$	$.$	$0$	$0$	$6$
$+$			$5$	$5$	$.$	$7$	$0$	$1$

			$0$	$.$	$0$	$1$	$9$
$+$	$5$	$3$	$7$	$.$	$4$	$0$	$0$
$+$		$2$	$0$	$.$	$7$	$2$	$0$

	$7$	$9$	$8$	$0$	$.$	$2$	$0$	$0$
$+$				$3$	$.$	$0$	$0$	$6$
$+$			$5$	$5$	$.$	$7$	$0$	$1$

			$0$	$.$	$0$	$1$	$9$
$+$	$5$	$3$	$7$	$.$	$4$	$0$	$0$
$+$		$2$	$0$	$.$	$7$	$2$	$0$