Question

Andrew is watching the stock market. He recorded the changes every day, as follows:Day 1: Opened at 4,798.68 pointsDay 2: Lost 125.07 pointsDay 3: Lost 36.5 pointsDay 4: Gained 52.71 pointsRound each number to the nearest whole number. Then, add the values to find the value on Day 5.4,6894,5854,5844,690

Answer 1

Given that the changes Andrew recorded everyday are, you can round them to the nearest whole number as follows:

- Identify the first decimal digit.

- If the first decimal digit is less than 5, the first digit before the decimal point does not change, and all the digits to its right become zero.

- If the first decimal digit is greater than or equal to 5, the first digit before the decimal point increases by 1, and all the digits to its right become zero.

Knowing the above, you can round all the numbers to the nearest whole number:

• Day 1:

`4,798.68\approx4,799`

• Day 2:

`125.07\approx125`

• Day 3:

`36.5\approx37`

• Day 4:

`52.71\approx53`

Knowing that on Day 1 the stock market opened at 4,798.68 points, you need to add the points gained and subtract the points lost from it, in order to find the sum and find the value on Day 5:

`4,799+125+37+53=5,014`

Hence, the answer is:

Numbers rounded:

• Day 1:

`4,799\text{ }points`

• Day 2:

`125\text{ }points`

• Day 3:

`37points`

• Day 4:

`53\text{ }points`

Value on Day 5:

`5,014\text{ }points`