Two-Digit Addition and Subtraction Worksheet

How to add and subtract two-digit numbers

Write the numbers in a column: ones under ones, tens under tens. Work with the ones first, then the tens.

Addition: 47 + 36

$\begin{array}{r}47\\+\,36\\\hline 83\end{array}$

1. Ones: ${7 + 6 = 13}$. Write 3 and carry 1 ten to the tens.
2. Tens: ${4 + 3 + 1 = 8}$.

So ${47 + 36 = 83}$.

Subtraction: 64 − 29

$\begin{array}{r}64\\-\,29\\\hline 35\end{array}$

1. $4$ is less than $9$, so take 1 ten from the 6 tens. Now you have 5 tens and 14 ones.
2. Ones: ${14 - 9 = 5}$.
3. Tens: ${5 - 2 = 3}$.

So ${64 - 29 = 35}$.

Check with the opposite operation: ${83 - 36 = 47}$ and ${35 + 29 = 64}$.

Only subtraction: Subtracting within 100 and Subtraction with Regrouping.