Write two 5-digit addends whose sum would give an estimate of 60,000
21,849 + 38,932 ≈ 20,000+40,000
30,000+30,000
70,000
40, 100 + 20, 000
To find two 5-digit addends whose sum would give an estimate of 60,000, we can follow these steps:
Step 1: Determine the range of 5-digit numbers.
A 5-digit number is any number from 10,000 to 99,999.
Step 2: Divide the estimated sum by 2.
The estimated sum is 60,000, so when divided by 2, we get 30,000.
Step 3: Look for two 5-digit numbers that are close to half the estimated sum.
Starting from the higher end of the 5-digit number range (99,999), we can search for a number that is close to 30,000.
Step 4: Subtract the first number found from half the estimated sum to get the second number.
Once we find a number close to 30,000, we subtract it from 30,000 to get the second number.
Let's find the two 5-digit addends using this method:
Step 1: The range of 5-digit numbers is 10,000 to 99,999.
Step 2: The estimated sum divided by 2 is 30,000.
Step 3: Let's start searching from the higher end of the range:
- The number 99,999 is above 30,000.
- The number 98,000 is still above 30,000.
- The number 94,000 is getting closer to 30,000.
- The number 92,000 is closer, but we need to find a number that is even closer.
- Finally, the number 90,000 is below 30,000.
Step 4: Now, we subtract the number we found (90,000) from half the estimated sum (30,000):
- 30,000 - 90,000 = -60,000
Since we are getting a negative value, it means the numbers we chose were too large. Let's try searching from the lower end of the range:
Step 3 (revised): Searching from the lower end of the range:
- The number 10,000 is below 30,000.
- The number 15,000 is closer, but we need to find a number that is even closer.
- Finally, the number 20,000 is above 30,000.
Step 4 (revised): Subtract the number we found (20,000) from half the estimated sum (30,000):
- 30,000 - 20,000 = 10,000
So, the two 5-digit addends whose sum would give an estimate of 60,000 are 20,000 and 10,000.