4,100
So, how does this simple calculation lead to so many mistakes?
Breaking Down the Calculation
The easiest way to avoid an error is to calculate the numbers one step at a time.
Start with:
1,000 + 40 = 1,040
Then add another 1,000:
1,040 + 1,000 = 2,040
Now add 30:
2,040 + 30 = 2,070
Add the next 1,000:
2,070 + 1,000 = 3,070
Then add 20:
3,070 + 20 = 3,090
Add another 1,000:
3,090 + 1,000 = 4,090
Finally, add 10:
4,090 + 10 = 4,100
That gives us the final answer:
