Decimal Word Problems

Front

What is a decimal?

Back

A decimal is a way of representing numbers that are not whole numbers, using a point (.) to separate the whole part from the fractional part.

Front

How do you estimate the sum of two decimal numbers?

Back

To estimate the sum, round each decimal to the nearest whole number and then add those rounded numbers.

Front

What is the total cost if you buy 2.5 meters of fabric at $6.20 per meter?

Back

$15.50 (2.5 x 6.20 = 15.50).

Front

How do you find the total mass of two objects?

Back

Add the mass of each object together.

Front

If Jan's lunch bill is $5.74 and she pays with a $10 bill, how do you calculate her change?

Back

Subtract the lunch bill from the amount paid: $10 - $5.74 = $4.26.

Front

What is the formula to calculate distance traveled if you know the distance of one lap and the number of laps?

Back

Distance = Distance per lap x Number of laps.

Front

What is the estimated total of 43.53 + 27.67?

Back

70 (rounding 43.53 to 44 and 27.67 to 28 gives 44 + 28 = 72, which is close to 70).

Front

What is the significance of rounding in decimal calculations?

Back

Rounding helps simplify calculations and provides a quick estimate.

Front

How do you convert a decimal to a fraction?

Back

To convert a decimal to a fraction, write the decimal over its place value (e.g., 0.75 = 75/100) and simplify.

Front

What is the difference between a proper fraction and an improper fraction?

Back

A proper fraction has a numerator smaller than the denominator, while an improper fraction has a numerator larger than or equal to the denominator.