2 Digit addition and Subtraction

Front

What is the process of making a ten in addition?

Back

Making a ten in addition involves regrouping numbers to simplify the addition process, often by combining a number with another number to reach the next ten.

Front

How do you solve subtraction problems using a number line?

Back

To solve subtraction problems using a number line, start at the larger number and move left the number of spaces equal to the smaller number being subtracted.

Front

What is the sum of 46 and 37?

Back

The sum of 46 and 37 is 83.

Front

When faced with a word problem involving addition, what should you look for?

Back

Look for keywords such as 'total', 'combined', or 'more' that indicate you need to add.

Front

What is the difference between addition and subtraction?

Back

Addition combines quantities to find a total, while subtraction finds the difference between quantities.

Front

In the context of subtraction, what does borrowing mean?

Back

Borrowing is a method used in subtraction when the top digit is smaller than the bottom digit, requiring you to take from the next higher place value.

Front

What is the importance of place value in addition and subtraction?

Back

Place value helps determine the value of digits in a number, which is crucial for correctly aligning numbers when adding or subtracting.

Front

What should you do if you need to subtract a larger number from a smaller number?

Back

You can regroup or borrow from the next place value to perform the subtraction.

Front

What is a common strategy for adding two-digit numbers?

Back

A common strategy is to add the tens first and then the ones.

Front

How can you check your work after performing addition or subtraction?

Back

You can check your work by performing the inverse operation (e.g., check addition with subtraction) or by estimating the answer.