## Estimate Sum of Decimals

### Estimate Decimal Sum with Rounding: Learn

How to Estimate a sum by rounding:

- Round each term that will be added
- Add the rounded numbers

Example: Estimate the sum of 0.988 + 0.53

- Round 0.988 + 0.53 to be 1 + 0.5
- Add the rounded numbers to obtain the estimated sum of 1.5
- The actual sum of 0.988 + 0.53 is 1.518

Some uses of rounding:

- Checking to see if you have enough money to buy what you want
- Getting a rough idea of the correct answer to a problem

### Estimating with Rounding: Practice

#### Estimate the sum by rounding the two numbers.

00:00

+ | = |

Press the Start Button To Begin

You have
0
correct and
0
incorrect.

This is
0
percent correct.

### Play

Game Name | Description | Best Score |
---|---|---|

How many correct answers can you get in 60 seconds? | 0 | |

Extra time is awarded for each correct answer.
Play longer by getting more correct. |
0 | |

How fast can you get 20 more correct answers than wrong answers? | 999 |

### Explore

#### Math Lessons by Grade

#### Math Topics

- Addition
- Algebra
- Comparing
- Counting
- Decimals
- Division
- Equations
- Estimation and Mental Math
- Exponents
- Fractions
- Geometry
- Measurement
- Money
- Multiplication
- Naming Numbers
- Patterns
- Percents and Ratios
- Place Value
- Properties
- Statistics
- Subtraction