The following are exercises on numbers: 1. Write twelve million five thousand three hundred and eighty in symbols. 2. There are 5898 learners in Utumishi School. Write the number of learners when roun

• Twelve million = 12,000,000
• Five thousand = 5,000
• Three hundred and eighty = 380

The number in symbols is $\boxed{12,005,380}$.

: There are 5898 learners in Utumishi School. What is the number of learners when rounded off to the nearest ten thousands.

The number is 5898. The ten thousands place is currently 0 (since $5898 < 10000$).

Since this digit (5) is 5 or greater, round up the ten thousands digit.

Rounding up 0 in the ten thousands place makes it 1. All subsequent digits become 0.

The number of learners rounded off to the nearest ten thousands is $\boxed{10,000}$.

: Chelimo was collected $82000 \, \text{m}^2$ of land. What is this area in hectares?

The area in hectares is $\boxed{8.2 \, \text{hectares}}$.