Decimal Word Problems

Front

What is a decimal number?

Back

A decimal number is a number that includes a decimal point, which separates the whole number part from the fractional part.

Front

How do you determine the number of decimal places in a product of two decimal numbers?

Back

Count the total number of decimal places in both numbers being multiplied. The sum gives the number of decimal places in the product.

Front

What is the process for adding decimal numbers?

Back

Align the decimal points and add as you would with whole numbers, placing the decimal point in the sum directly below the other decimal points.

Front

How do you subtract decimal numbers?

Back

Align the decimal points, subtract as you would with whole numbers, and place the decimal point in the result directly below the other decimal points.

Front

What is the significance of rounding in decimal calculations?

Back

Rounding helps simplify numbers to make calculations easier, but it can also lead to loss of precision.

Front

How do you convert a decimal to a fraction?

Back

To convert a decimal to a fraction, write the decimal as a fraction with the decimal number as the numerator and a power of 10 as the denominator, then simplify.

Front

What is the importance of estimating in decimal word problems?

Back

Estimating helps to quickly assess whether an answer is reasonable and can guide the calculation process.

Front

How do you find the total cost when given a unit price and quantity?

Back

Multiply the unit price by the quantity to find the total cost.

Front

What is the method for dividing decimal numbers?

Back

Move the decimal point in the divisor to make it a whole number, then move the decimal point in the dividend the same number of places and divide as usual.

Front

How do you check your work in decimal calculations?

Back

You can check your work by reversing the operation (e.g., if you added, subtract the result from one of the original numbers) or by estimating.