estimate the sum by rounding each number to the nearest hundtreth: 0.087 + 0.043
To estimate the sum by rounding each number to the nearest hundredth, we need to round 0.087 and 0.043 separately and then add the rounded numbers together.
Rounding 0.087 to the nearest hundredth, we get 0.09.
Rounding 0.043 to the nearest hundredth, we get 0.04.
Adding the rounded numbers together:
0.09 + 0.04 = 0.13
Therefore, the estimated sum by rounding each number to the nearest hundredth is 0.13.