How can you use rounding to estimate 331 + 193?
think appr 330 + 200
To use rounding to estimate the sum of 331 + 193, you can round each number to the nearest ten and then add them together.
First, round 331 to the nearest ten. In this case, 331 is closer to 330 than to 340.
Next, round 193 to the nearest ten. Here, 193 is closer to 190 than to 200.
Now, add the rounded numbers together: 330 + 190 = 520.
Therefore, using rounding, you can estimate that 331 + 193 is approximately 520.