In the last three months, 674 boys and 706 girls were seen by doctors in the ER. 355 of those children were six-years-old or under. a. By rounding the values to the nearest ten, estimate the number of children seen in the ER. b. Using the original values, calculate the exact number of children seen in the ER. c. By rounding the values to the nearest ten, estimate the number of children over the age of six.

**Step 1. Calculate the total number of children seen in the ER.** Using the given values, we have: \[ 674 + 706 = 1380 \] **(a) Estimate by rounding the values to the nearest ten.** - Rounding \(674\) to the nearest ten gives \(670\). - Rounding \(706\) to the nearest ten gives \(710\). Then, \[ 670 + 710 = 1380 \] **(b) Calculate using the original values.** \[ 674 + 706 = 1380 \] **(c) Estimate the number of children over the age of six by rounding to the nearest ten.** We are told that \(355\) of the children are six-years-old or under. First, round \(355\) to the nearest ten: \[ 355 \text{ rounds to } 360 \] Then, the estimated number of children over the age of six is: \[ 1380 - 360 = 1020 \]