Rounding to Decimal Places Flashcards

GCSE Mathematics (Edexcel) 1MA1

Rounding to decimal places

The process of reducing the number of digits after the decimal point while keeping the value as close as possible to the original.

1 / 10

Ready to master these flashcards?

Sign in to study with spaced repetition and track your progress.

Sign In to Track Progress

Terms in this set (10)

1

Rounding to decimal places

The process of reducing the number of digits after the decimal point while keeping the value as close as possible to the original.

2

Decimal place

The position of a digit to the right of the decimal point. For example, the first decimal place is the first digit after the decimal point.

3

Step 1 of rounding to decimal places

Identify the digit in the required decimal place.

4

Step 2 of rounding to decimal places

Look at the digit immediately to the right of the required decimal place.

5

Rule for rounding up

If the digit to the right is 5 or greater, increase the digit in the required decimal place by 1.

6

Rule for rounding down

If the digit to the right is less than 5, keep the digit in the required decimal place the same.

7

Effect of rounding on trailing digits

All digits to the right of the required decimal place are removed after rounding.

8

Example: Round 3.456 to 2 decimal places

The answer is 3.46 because the third decimal place (6) is 5 or greater, so the second decimal place (5) is rounded up.

9

Example: Round 7.432 to 1 decimal place

The answer is 7.4 because the second decimal place (3) is less than 5, so the first decimal place (4) remains the same.

10

Why rounding is important

Rounding simplifies numbers for easier interpretation and use, especially in real-world contexts like measurements and estimates.

Genie

Want to Learn More?

Get personalised lessons, quizzes, and instant feedback from your AI tutor.

Start Learning