Exercises: Subtraction

Compute the following differences.

$524 - 382$

For this task you need the following basic knowledge: Subtraction
$524 - 382$
Subtract from right to left. Subtract the ones first: $4 - 2 = 2$ .
$\begin{array}{l} 5 2 4 \\ - 3 8 2 \\ 2 \end{array}$
Now subtract the tens. Since $8$ is greater than $2$ , you need to calculate $12 - 8 = 4$ instead and "memorize" a $1$ at the hundreds digit.
$\begin{array}{l} 5 2 4 \\ -_{1} 3 8 2 \\ 4 2 \end{array}$
Then subtract the hundreds: $5 - 3 - 1 = 1$ .
$\begin{array}{l} 5 2 4 \\ -_{1} 3 8 2 \\ 1 4 2 \end{array}$
The result is therefore $142$ .
Write the numbers one below the other. Subtract within the right column first (ones), then within the next column left to it (tens), and finally within the column on the very left (hundreds).
$876 - 351$

For this task you need the following basic knowledge: Subtraction
$876 - 351$
Subtract from right to left. Subtract the ones first: $6 - 1 = 5$ .
$\begin{array}{l} 8 7 6 \\ - 3 5 1 \\ 5 \end{array}$
Now subtract the tens: $7 - 5 = 2$ .
Then subtract the hundreds: $8 - 3 = 5$ .
$\begin{array}{l} 8 7 6 \\ - 3 5 1 \\ 5 2 5 \end{array}$
The result is therefore $525$ .
Write the numbers one below the other. Subtract within the right column first (ones), then within the next column left to it (tens), and finally within the column on the very left (hundreds).
$954 - 733$

For this task you need the following basic knowledge: Subtraction
$954 - 733$
Subtract from right to left. Subtract the ones first: $4 - 3 = 1$ .
$\begin{array}{l} 9 5 4 \\ - 7 3 3 \\ 1 \end{array}$
Now subtract the tens: $5 - 3 = 2$ .
$\begin{array}{l} 9 5 4 \\ - 7 3 3 \\ 2 1 \end{array}$
Then subtract the hundreds: $9 - 7 = 2$ :
$\begin{array}{l} 9 5 4 \\ - 7 3 3 \\ 2 2 1 \end{array}$
The result is therefore $221$ .
Write the numbers one below the other. Subtract within the right column first (ones), then within the next column left to it (tens), and finally within the column on the very left (hundreds).
$789 - 599$

For this task you need the following basic knowledge: Subtraction
$789 - 599$
Subtract from right to left. Subtract the ones first: $9 - 9 = 0$ .
$\begin{array}{l} 7 8 9 \\ - 5 9 9 \\ 0 \end{array}$
Then subtract the tens. Since $9$ is greater than $8$ , you need to calculate $18 - 9 = 9$ instead and "memorize" a $1$ in the hundreds place.
$\begin{array}{l} 7 8 9 \\ -_{1} 5 9 9 \\ 9 0 \end{array}$
Then subtract the hundreds: $7 - 5 - 1 = 1$ .
$\begin{array}{l} 7 8 9 \\ -_{1} 5 9 9 \\ 1 9 0 \end{array}$
The result is therefore 190.
Write the numbers one below the other. Subtract within the right column first (ones), then within the next column left to it (tens), and finally within the column on the very left (hundreds).
$222 - 189$

For this task you need the following basic knowledge: Subtraction
$222 - 189$
Subtract from right to left. First, subtract the ones: Since $9$ is greater than $2$ , you need to subtract $12 - 9$ instead and "memorize" a $1$ in the tens place.
$\begin{array}{l} 2 2 2 \\ - 1 8_{1} 9 \\ 3 \end{array}$
Now subtract the tens. Since $8 + 1 = 9$ is greater than $2$ , you need to calculate $12 - 9 = 3$ instead and "memorize" a $1$ in the hundreds place.
$\begin{array}{l} 2 2 2 \\ - 1_{1} 8_{1} 9 \\ 3 3 \end{array}$
Then subtract the hundreds: $2 - 1 - 1 = 0$ .
The result is therefore 33.
Write the numbers one below the other. Subtract within the right column first (ones), then within the next column left to it (tens), and finally within the column on the very left (hundreds).
$596 - 374$

For this task you need the following basic knowledge: Subtraction
$596 - 374$
Subtract from right to left. Subtract the ones first: $6 - 4 = 2$ .
$\begin{array}{l} 5 9 6 \\ - 3 7 4 \\ 2 \end{array}$
Now subtract the tens: $9 - 7 = 2$ .
Then subtract the hundreds: $5 - 3 = 2$ .
$\begin{array}{l} 5 9 6 \\ - 3 7 4 \\ 2 2 2 \end{array}$
The result is therefore 222.
Write the numbers one below the other. Subtract within the right column first (ones), then within the next column left to it (tens), and finally within the column on the very left (hundreds).
$658 - 157$

For this task you need the following basic knowledge: Subtraction
$658 - 157$
Subtract from right to left. Subtract the ones first: $8 - 7 = 1$ .
$\begin{array}{l} 6 5 8 \\ - 1 5 7 \\ 1 \end{array}$
Now subtract the tens: $5 - 5 = 0$ .
$\begin{array}{l} 6 5 8 \\ - 1 5 7 \\ 0 1 \end{array}$
Then subtract the hundreds: $6 - 1 = 5$ .
$\begin{array}{l} 6 5 8 \\ - 1 5 7 \\ 5 0 1 \end{array}$
The result is therefore 501.
Write the numbers one below the other. Subtract within the right column first (ones), then within the next column left to it (tens), and finally within the column on the very left (hundreds).
$352 - 131$

For this task you need the following basic knowledge: Subtraction
$352 - 131$
Subtract from right to left. Subtract the ones first: $2 - 1 = 1$ .
$\begin{array}{l} 3 5 2 \\ - 1 3 1 \\ 1 \end{array}$
Now subtract the tens: $5 - 3 = 2$ .
$\begin{array}{l} 3 5 2 \\ - 1 3 1 \\ 2 1 \end{array}$
Then subtract the hundreds: $3 - 1 = 2$ .
$\begin{array}{l} 3 5 2 \\ - 1 5 7 \\ 2 2 1 \end{array}$
The result is therefore 221.
Write the numbers one below the other. Subtract within the right column first (ones), then within the next column left to it (tens), and finally within the column on the very left (hundreds).

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