Round each of the following numbers to the nearest ten :

(i) 54

(ii) 327

(iii) 2,793

(iv) 8,049

(v) 12,345

(i) 54

The units digit is 4. Since 4 is less than 5, we round down.

Hence, number rounded to the nearest ten = 50.

(ii) 327

The units digit is 7. Since 7 is 5 or greater, we round up the tens digit.

The tens digit (2) becomes 3, and the units digit becomes 0.

Hence, number rounded to the nearest ten = 330.

(iii) 2,793

The units digit is 3. Since 3 is less than 5, we round down.

Hence, number rounded to the nearest ten = 2,790.

(iv) 8,049

The units digit is 9. Since 9 is 5 or greater, we round up the tens digit.

The tens digit (4) becomes 5, and the units digit becomes 0.

Hence, number rounded to the nearest ten = 8,050.

(v) 12,345

The units digit is 5. Since 5 is 5 or greater, we round up the tens digit.

The tens digit (4) becomes 5, and the units digit becomes 0.

Hence, number rounded to the nearest ten = 12,350.