Regrouping Addition and Subtraction

Front

What is regrouping in addition and subtraction?

Back

Regrouping is a method used in addition and subtraction where numbers are rearranged to make calculations easier, often involving carrying over or borrowing.

Front

How do you find the difference between two numbers?

Back

To find the difference, subtract the smaller number from the larger number.

Front

If there are 347 students and 123 are boys, how do you calculate the number of girls?

Back

Subtract the number of boys from the total number of students: 347 - 123 = 224 girls.

Front

What is the sum of 129 and 43?

Back

The sum is found by adding the two numbers: 129 + 43 = 172.

Front

What is the inverse operation of addition?

Back

Subtraction is the inverse operation of addition.

Front

What does it mean to borrow in subtraction?

Back

Borrowing in subtraction is a technique used when the top digit is smaller than the bottom digit, requiring you to take from the next column.

Front

What is the process of carrying in addition?

Back

Carrying is when the sum of a column exceeds 10, and you move the extra value to the next column to the left.

Front

How do you solve a word problem involving addition?

Back

Identify the numbers involved, determine what is being asked, and perform the addition operation to find the answer.

Front

What is a word problem?

Back

A word problem is a mathematical problem presented in a narrative form, requiring interpretation and calculation.

Front

How can you check your subtraction answer?

Back

You can check your subtraction answer by adding the difference to the smaller number to see if it equals the larger number.