Unit 3 review

Front

What is rounding in mathematics?

Back

Rounding is the process of adjusting the digits of a number to make it simpler while keeping its value close to what it was. It often involves increasing or decreasing the last digit based on the value of the digit to its right.

Front

How do you round a number to the nearest tenth?

Back

To round a number to the nearest tenth, look at the digit in the hundredths place. If it is 5 or greater, round the tenths place up by one. If it is less than 5, keep the tenths place the same.

Front

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

Back

The place value of a digit is the value it holds based on its position in the number. For example, in the number 56,338, the 3 in the tens place represents 30, while the 3 in the hundreds place represents 300.

Front

How do you express a number in standard form?

Back

Standard form is a way of writing numbers using digits. For example, 'eight hundred fifty-nine and four hundredths' is written as 859.04 in standard form.

Front

What is the difference between word form and standard form?

Back

Word form is the way a number is written using words, while standard form is the numerical representation of that number. For example, 80.509 in word form is 'Eighty and five hundred nine thousandths'.

Front

What does it mean to round a number to the nearest hundredth?

Back

Rounding to the nearest hundredth involves looking at the digit in the thousandths place. If it is 5 or greater, round the hundredths place up by one. If it is less than 5, keep the hundredths place the same.

Front

What is the significance of place value in understanding numbers?

Back

Place value helps us understand the magnitude of each digit in a number, allowing us to interpret and manipulate numbers accurately.

Front

How can you determine the value of a digit in a number?

Back

To determine the value of a digit, multiply the digit by its place value. For example, in the number 56,338, the value of the 3 in the hundreds place is 3 x 100 = 300.

Front

What is the process for converting a decimal to word form?

Back

To convert a decimal to word form, write the whole number part in words, then use 'and' for the decimal point, followed by the decimal part expressed in words according to its place value.

Front

What is the role of the digit to the right when rounding?

Back

The digit to the right of the place you are rounding to determines whether you round up or keep the digit the same. If it is 5 or greater, you round up; if it is less than 5, you do not.