429.069796 + 114.789796 + 32.649796 + 0.509796 + 86.229796 + 86.229796 + 371.949796 =

The sum of the given numbers is \( 1121.428572 \).

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Here are some related questions for practice:
1. What is the average of these numbers?
2. How would the result change if one of the numbers was doubled?
3. What is the sum if you omit the smallest number?
4. Can you calculate the sum with each number rounded to two decimal places?
5. What is the difference between the largest and smallest numbers in this set?

**Tip:** When working with multiple numbers, grouping similar values can simplify mental calculations!

This example shows how to sum the numbers 429.069796, 114.789796, 32.649796, 0.509796, 86.229796, 86.229796, and 371.949796 to get a total of 1121.428572. This problem covers key arithmetic concepts, including addition and the commutative property, and is suitable for students in Grades 4-6.

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