Add and Subtract Decimals_MultiStep

Front

What is a decimal?

Back

A decimal is a fraction whose denominator is a power of ten, represented with a dot (decimal point) separating the whole number from the fractional part.

Front

How do you add decimals?

Back

To add decimals, align the numbers by the decimal point and add as you would whole numbers, placing the decimal point in the sum directly below the other decimal points.

Front

How do you subtract decimals?

Back

To subtract decimals, align the numbers by the decimal point and subtract as you would whole numbers, placing the decimal point in the difference directly below the other decimal points.

Front

What is the order of operations?

Back

The order of operations is a set of rules that dictates the sequence in which calculations are performed: Parentheses, Exponents, Multiplication and Division (from left to right), Addition and Subtraction (from left to right).

Front

What does 'multi-step' mean in math problems?

Back

'Multi-step' means that the problem requires more than one operation (like addition, subtraction, multiplication, or division) to arrive at the final answer.

Front

What is the first step in solving a multi-step decimal problem?

Back

The first step is to identify the operations needed and the order in which to perform them.

Front

How do you check your work after solving a decimal problem?

Back

You can check your work by reversing the operations (if you added, subtract to check; if you subtracted, add to check) or by estimating the answer.

Front

What is the significance of the decimal point?

Back

The decimal point separates the whole number part from the fractional part, indicating the value of digits to the right of it.

Front

How do you round decimals?

Back

To round decimals, look at the digit to the right of the place you are rounding to. If it's 5 or more, round up; if it's less than 5, round down.

Front

What is the result of adding 0.9 to 103.9?

Back

The result is 104.8.