Understanding Decimal Numbers

Front

What is a decimal number?

Back

A decimal number is a number that consists of a whole number and a fractional part separated by a decimal point.

Front

What are the parts of a decimal number?

Back

A decimal number consists of a whole number part and a fractional part, separated by a decimal point.

Front

What are the different forms of decimal numbers?

Back

Decimal numbers can be expressed in standard form, expanded form, and word form.

Front

What is a pure decimal 纯小数?

Back

A pure decimal is a decimal number that has only digits after the decimal point, with no whole number part.

Front

What is a mixed decimal 带小数?

Back

A mixed decimal is a decimal number that has both a whole number part and a fractional part.

Front

9 thousandths can be written as_____.

Back

0.009

Front

There are 789 hundredths in _____.

Back

7.89

Front

5 × 1 + 6 × 0.1 + 7 × 0.01 + 8 × 0.001

Back

5.678

Front

How to describe the number of decimal places?

Back

When describing the number of decimal places, you can refer to the digits after the decimal point. For example:

0.5 has one decimal place.

0.55 has two decimal places.

0.555 has three decimal places.