Unit 4 Test Review: Multiplying and Dividing Decimals

Front

What is a decimal?

Back

A decimal is a fraction whose denominator is a power of ten, represented with a decimal point. For example, 0.5 is a decimal that represents 5/10.

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 numbers and place the decimal point in the product accordingly.

Front

What is the result of 5.36 x 5?

Back

The result is 26.8.

Front

How do you divide decimals?

Back

To divide decimals, move the decimal point in the divisor to the right until it is a whole number. Move the decimal point in the dividend the same number of places, then divide as usual.

Front

What is 19.5 ÷ 0.31?

Back

To solve, move the decimal two places to the right in both numbers, making it 1950 ÷ 31, which equals 63.06.

Front

What is the weight of Bronx in pounds if he weighs 4.7 kilograms?

Back

Bronx weighs approximately 10.34 pounds (4.7 kg x 2.2 lbs/kg).

Front

What does it mean to round a decimal?

Back

Rounding a decimal means adjusting its value to make it simpler while keeping it close to the original value. For example, rounding 2.76 to the nearest whole number gives 3.

Front

What is the place value of 5 in 0.56?

Back

The place value of 5 in 0.56 is 'tenths'.

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 if possible.

Front

What is 12.9 x 4?

Back

The result is 51.6.