Approximation and Estimation

Front

What is approximation?

Back

Approximation is a value or number that is close to, but not exactly equal to, a specific value. It is often used when an exact number is not necessary.

Front

What is estimation?

Back

Estimation is the process of finding an approximate value based on reasonable assumptions or calculations, often used when exact data is unavailable.

Front

What are significant figures?

Back

Significant figures are the digits in a number that contribute to its precision, including all non-zero digits, any zeros between significant digits, and trailing zeros in the decimal part.

Front

How do you round a number to a specific number of significant figures?

Back

To round a number to a specific number of significant figures, identify the digit at the desired position, look at the next digit to decide whether to round up or down, and then remove all digits to the right.

Front

Round 0.010229 to four significant figures.

Back

0.01023

Front

How many significant figures are in the number 4004?

Back

4

Front

What is 98.907 rounded to 1 significant figure?

Back

100

Front

How many significant figures are in 107,003 m?

Back

6

Front

Round 1009 to three significant figures.

Back

1010

Front

What is the rule for counting significant figures in whole numbers?

Back

In whole numbers, all non-zero digits are significant, and any zeros between them are also significant. Leading zeros are not significant.