PRACTICE #7 Addition with or without Regrouping

Front

What is addition?

Back

Addition is the mathematical operation of combining two or more numbers to get a total or sum.

Front

What does the term 'sum' refer to in mathematics?

Back

The term 'sum' refers to the result of adding two or more numbers together.

Front

What is the sum of 74 and 12?

Back

The sum of 74 and 12 is 86.

Front

What does it mean to regroup in addition?

Back

Regrouping in addition means to carry over a value from one column to the next when the sum exceeds the base value (e.g., 10 in base 10).

Front

How do you add two-digit numbers without regrouping?

Back

To add two-digit numbers without regrouping, simply add the tens and ones separately, ensuring that the sum of the ones does not exceed 9.

Front

What is the sum of 35 and 38?

Back

The sum of 35 and 38 is 73, which can be expressed as 7 tens and 3 ones.

Front

In the problem, 'There are 33 erasers on a table. Ms. Smith puts 25 more erasers on the table. How many erasers are there altogether?', what operation should be used?

Back

The operation to be used is addition.

Front

What is the first step in solving a word problem involving addition?

Back

The first step is to identify the numbers involved and the operation required, which is usually indicated by keywords like 'sum' or 'altogether'.

Front

What is the importance of keywords in word problems?

Back

Keywords help identify the mathematical operations needed to solve the problem, guiding students in determining whether to add, subtract, multiply, or divide.

Front

How can you check your addition for accuracy?

Back

You can check your addition by using the inverse operation (subtraction) or by estimating the sum before calculating.