Multi-digit Addition and Subtraction Weekend Challenge 1

Front

What is multi-digit addition?

Back

Multi-digit addition is the process of adding numbers that have more than one digit, aligning the numbers by place value and adding each column from right to left, carrying over any values as necessary.

Front

What is multi-digit subtraction?

Back

Multi-digit subtraction is the process of subtracting numbers that have more than one digit, aligning the numbers by place value and subtracting each column from right to left, borrowing from the next column if necessary.

Front

How do you find the total when adding two numbers?

Back

To find the total when adding two numbers, align the numbers by their place values, add each column starting from the rightmost column, and carry over any values to the next column if the sum exceeds 9.

Front

What is the process for estimating sums?

Back

To estimate sums, round each number to the nearest largest place value (e.g., hundreds, thousands) and then add the rounded numbers together.

Front

How do you perform subtraction with borrowing?

Back

When performing subtraction with borrowing, if the top digit is smaller than the bottom digit in a column, you borrow 1 from the next left column, which increases the top digit by 10.

Front

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

Back

Place value is crucial in addition and subtraction as it determines the value of each digit in a number, ensuring that numbers are aligned correctly for accurate calculations.

Front

How do you calculate the difference between two numbers?

Back

To calculate the difference between two numbers, subtract the smaller number from the larger number, ensuring proper alignment by place value.

Front

What is the significance of rounding in estimation?

Back

Rounding simplifies calculations by making numbers easier to work with, allowing for quick estimates of sums or differences without exact calculations.

Front

How do you solve a word problem involving addition?

Back

To solve a word problem involving addition, identify the quantities being combined, translate the problem into a mathematical equation, and then perform the addition.

Front

What steps should you take to solve a word problem involving subtraction?

Back

To solve a word problem involving subtraction, identify the initial quantity and the amount being taken away, translate the problem into a mathematical equation, and then perform the subtraction.