Addition and Subtraction with Regrouping

Front

What is regrouping in addition?

Back

Regrouping in addition is the process of carrying over a value from one column to the next when the sum of a column exceeds 10.

Front

What is regrouping in subtraction?

Back

Regrouping in subtraction is the process of borrowing from the next column when the top number is smaller than the bottom number in a column.

Front

Estimate the sum: 478 + 265

Back

Estimate: 500 + 300 = 800.

Front

What does it mean to estimate a sum?

Back

Estimating a sum means finding a close approximation of the total by rounding the numbers before adding.

Front

What is the pattern in the sequence: 10, 20, 30, ___?

Back

The next number is 40. The pattern increases by 10.

Front

How do you add numbers with regrouping?

Back

Add the digits in each column starting from the right. If the sum is 10 or more, carry over to the next column.

Front

What is the difference between addition and subtraction?

Back

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

Front

Complete the number pattern: 5, 10, 15, ___?

Back

The next number is 20. The pattern increases by 5.

Front

Estimate the answer: 1,234 + 567

Back

Estimate: 1,200 + 600 = 1,800.

Front

What is a number sentence?

Back

A number sentence is a mathematical statement that includes numbers and an operation (like + or -) to show a relationship.