Question

A whole year level of 164 students is to be divided into 18 groups. By rounding

both numbers to the nearest 10, approximate the number of students in each
group.

Answer 1

10

Explanation:

no. of students in each group=164/18=9.111111...=10 (nearest 10)

Answer 2

8

Explanation:

When rounding to the nearest 10:

• If the units are 0, 1, 2, 3 or 4 → round down
• If the units are 5, 6, 7, 8 or 9 → round up

Therefore:

164 rounded to the nearest 10 = 160

18 rounded to the nearest 10 = 20

To approximate the number of students in each year group, divide the rounded number of students by the rounded number of groups:

⇒ 160 ÷ 20 = 8