Big Ideas: Chapter 5 Multiplying Decimals Test Review

Front

What is a decimal?

Back

A decimal is a number that includes a decimal point, which separates the whole number part from the fractional part. For example, 0.5 is a decimal.

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 value of 0.05 times 10.6?

Back

0.53 (This is how much a mouse weighs if it is 0.05 times the weight of a rat that weighs 10.6 ounces.)

Front

How do you find the difference between two numbers?

Back

To find the difference, subtract the smaller number from the larger number.

Front

What is 0.01 times 350?

Back

3.5 (This is the height of the model building that is 0.01 times as tall as a 350 feet tall building.)

Front

What is the total protein in 2 containers of yogurt if each has 16.2 grams?

Back

32.4 grams (You multiply 16.2 grams by 2 to find the total.)

Front

What does it mean to estimate a product?

Back

Estimating a product means to find a rough calculation of the answer, often by rounding the numbers to make the multiplication easier.

Front

Is 40 × 3 an overestimate or an underestimate for 37 × 2.94?

Back

It is an overestimate because 40 is greater than 37 and 3 is greater than 2.94.

Front

What is the product of 0.4 and 3?

Back

1.2 (This is found by multiplying 0.4 by 3.)

Front

How do you convert a fraction to a decimal?

Back

To convert a fraction to a decimal, divide the numerator (top number) by the denominator (bottom number).