Lesson 2-3

Front

What is the value of a digit in the tens place?

Back

The value of a digit in the tens place is 10 times the digit. For example, in the number 54, the 5 is in the tens place and its value is 50.

Front

How do you express a number in expanded form?

Back

Expanded form expresses a number as the sum of the values of its digits. For example, 345 can be expressed as (3 x 100) + (4 x 10) + (5 x 1).

Front

What does it mean to compare two numbers?

Back

Comparing two numbers means determining which number is greater, less than, or equal to the other.

Front

How do you round a number to the nearest tenth?

Back

To round a number to the nearest tenth, look at the hundredths place. If it is 5 or greater, round up; if it is less than 5, round down.

Front

What is estimation in mathematics?

Back

Estimation is a method of finding an approximate value that is close to the exact answer, often used for simplifying calculations.

Front

What is the difference between two numbers?

Back

The difference is the result of subtracting one number from another. For example, the difference between 10 and 4 is 6 (10 - 4 = 6).

Front

What does it mean to round a number?

Back

Rounding a number means adjusting it to a nearby specified value, making it simpler but still close to the original value.

Front

What is the place value of 5 in the number 5,678?

Back

In the number 5,678, the 5 is in the thousands place, so its value is 5,000.

Front

How do you write a number in standard form?

Back

Standard form is writing a number using digits. For example, the number five thousand six hundred seventy-eight is written as 5,678.

Front

What is the value of 0.5 in terms of fractions?

Back

0.5 is equivalent to the fraction 1/2.