Adding and Subtracting Decimals with Models

Front

What is the process of adding decimals?

Back

To add decimals, align the decimal points and add each column starting from the right, carrying over if necessary.

Front

What is the process of subtracting decimals?

Back

To subtract decimals, align the decimal points and subtract each column starting from the right, borrowing if necessary.

Front

What does a hundreds grid represent in decimal form?

Back

A hundreds grid represents values in tenths and hundredths, where each square represents 0.01.

Front

How do you convert a model representation to a decimal?

Back

Count the filled squares in the model and multiply by 0.01 for each square to find the decimal equivalent.

Front

What is the decimal equivalent of 86 hundredths?

Back

0.86

Front

What is the result of 9.43 - 3.34?

Back

6.09

Front

What does the term 'subtraction' indicate in a model?

Back

It indicates that a quantity is being taken away from another quantity.

Front

How can you check your work after adding or subtracting decimals?

Back

You can check your work by reversing the operation: for addition, subtract the sum from one of the addends; for subtraction, add the difference to the subtrahend.

Front

What is the importance of aligning decimal points when performing operations?

Back

Aligning decimal points ensures that each digit is in the correct place value, which is crucial for accurate calculations.

Front

What is the value of 0.19 in terms of hundredths?

Back

19 hundredths.