1.

Fill in the blank to make the conversion true.

660000 centimeters = ____kilometers

**Answer: Option 'D'**

**Step 1:
We know that
1 kilometer (km) = 1000 meters (m)
1 meter (m) = 100 centimeters (cm)
Step 2:
660000 centimeters = 660000 cm × 1 m/100 cm × 1 km/1000 m
= 6.6 km
So, 660000 centimeters = 6.6 kilometers**

2.

Fill in the blank to make the conversion true.

9.9 kilometers = ____centimeters

**Answer: Option 'C'**

**Step 1:
We know that
1 kilometer (km) = 1000 meters (m)
1 meter (m) = 100 centimeters (cm)
Step 2:
9.9 kilometers = 9.9 km × 1000 m/1 km × 100 cm/1 m = 990000 cm
So, 9.9 kilometers = 990000 centimeters**

3.

Fill in the blank to make the conversion true.

4500000 millimeters = ____kilometers

**Answer: Option 'C'**

**Step 1:
We know that
1 kilometer (km) = 1000 meters (m)
1 meter (m) = 1000 millimeters (mm)
Step 2:
4500000 millimeters = 4500000 mm × 1 m/1000 mm × 1 km/1000 m
= 4.5 km
So, 4500000 millimeters = 4.5 kilometers**

4.

Fill in the blank to make the conversion true.

118000 centimeters = ____kilometers

**Answer: Option 'D'**

**Step 1:
We know that
1 kilometer (km) = 1000 meters (m)
1 meter (m) = 100 centimeters (cm)
Step 2:
118000 centimeters = 118000 cm × 1 m/100 cm × 1 km/1000 m
= 1.18 km
So, 118000 centimeters = 1.18 kilometers**

5.

Fill in the blank to make the conversion true.

2300000 millimeters = ____kilometers

**Answer: Option 'B'**

**Step 1:
We know that
1 kilometer (km) = 1000 meters (m)
1 meter (m) = 1000 millimeters (mm)
Step 2:
2300000 millimeters = 2300000 mm × 1 m/1000 mm × 1 km/1000 m
= 2.3 km
So, 2300000 millimeters = 2.3 kilometers**

6.

Fill in the blank to make the conversion true.

3356000 milliliters = ____kiloliters

**Answer: Option 'A'**

**Step 1:
We know that
1 kiloliter (kl) = 1000 liters (l)
1 liter (l) = 1000 milliliters (ml)
Step 2:
3356000 milliliters = 3356000 ml × 1 l/1000 ml × 1 kl/1000 l = 3.356 kl
So, 3356000 milliliters = 3.356 kiloliters**

7.

Fill in the blank to make the conversion true.

2.8 kilometers = ____millimeters

**Answer: Option 'C'**

**Step 1:
We know that
1 kilometer (km) = 1000 meters (m)
1 meter (m) = 1000 millimeters (mm)
Step 2:
2.8 kilometers = 2.8 km × 1000 m/1 km × 1000 mm/1m = 2800000 mm
So, 2.8 kilometers = 2800000 millimeters**

8.

Fill in the blank to make the conversion true.

6700000 millimeters = ____kilometers

**Answer: Option 'D'**

**Step 1:
We know that
1 kilometer (km) = 1000 meters (m)
1 meter (m) = 1000 millimeters (mm)
Step 2:
6700000 millimeters = 6700000 mm × 1 m/1000 mm × 1 km/1000 m
= 6.7 km
So, 6700000 millimeters = 6.7 kilometers**

9.

Fill in the blank to make the conversion true.

5.7 kilometers = ____millimeters

**Answer: Option 'D'**

**Step 1:
We know that
1 kilometer (km) = 1000 meters (m)
1 meter (m) = 1000 millimeters (mm)
Step 2:
5.7 kilometers = 5.7 km × 1000 m/1 km × 1000 mm/1m = 5700000 mm
So, 5.7 kilometers = 5700000 millimeters**

10.

Fill in the blank to make the conversion true.

3.99 kilograms = ____milligrams

**Answer: Option 'D'**

**Step 1:
We know that
1 kilogram (kg) = 1000 grams (g)
1 gram (g) = 1000 milligrams (mg)
Step 2:
3.99 kilograms = 3.99 kg × 1000 g/1 kg × 1000 mg/1g = 3990000 mm
So, 3.99 kilograms = 3990000 milligrams**

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