Add, Subtract, and Multiply Decimals Test

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

What is the process for subtracting decimals?

Back

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

Front

How do you multiply decimals?

Back

To multiply decimals, multiply the numbers as if they were whole numbers, then count the total number of decimal places in both factors and place the decimal point in the product accordingly.

Front

What is the product of 4.2 and 7.8?

Back

The product of 4.2 and 7.8 is 32.76.

Front

What is 1.572 + 0.38?

Back

1.572 + 0.38 = 1.952.

Front

What is 1.53 x 0.7?

Back

1.53 x 0.7 = 1.071.

Front

What is the difference between the heaviest and lightest lime if they weigh 4.28 ounces and 2.85 ounces?

Back

The difference is 1.97 ounces.

Front

If a stew recipe calls for 3.75 pounds of meat, how much meat is needed for 5 batches?

Back

Jack needs 18.75 pounds of meat for 5 batches.

Front

What is the first step in solving a decimal multiplication problem?

Back

The first step is to multiply the numbers as if they were whole numbers.