Convert these units of measurement

Convert these units of measurement. 1. 780 mm = \boxed{} cm 3. 25 000 cm = \boxed{} m 5. 7 km = \boxed{} m 7. 0,5 cm = \boxed{} mm 9. 6,5 cm = \boxed{} mm 2. 45 cm = \boxed{} mm 4. 8 m = \boxed{} cm 6. 135 000 m = \boxed{} km 8. 0,5 km = \boxed{} m 10. 2,5 km = \boxed{} m

The Correct Answer and Explanation is:

Here are the correct conversions for the given units:

1. 780 mm = 78 cm
   Explanation: There are 10 millimeters in 1 centimeter. So, to convert millimeters to centimeters, divide by 10.
   780 mm÷10=78 cm780 \, \text{mm} \div 10 = 78 \, \text{cm}780mm÷10=78cm.
2. 25,000 cm = 250 m
   Explanation: There are 100 centimeters in 1 meter. To convert centimeters to meters, divide by 100.
   25,000 cm÷100=250 m25,000 \, \text{cm} \div 100 = 250 \, \text{m}25,000cm÷100=250m.
3. 7 km = 7,000 m
   Explanation: There are 1,000 meters in 1 kilometer. So, to convert kilometers to meters, multiply by 1,000.
   7 km×1,000=7,000 m7 \, \text{km} \times 1,000 = 7,000 \, \text{m}7km×1,000=7,000m.
4. 0.5 cm = 5 mm
   Explanation: There are 10 millimeters in 1 centimeter. So, to convert centimeters to millimeters, multiply by 10.
   0.5 cm×10=5 mm0.5 \, \text{cm} \times 10 = 5 \, \text{mm}0.5cm×10=5mm.
5. 6.5 cm = 65 mm
   Explanation: As mentioned earlier, 1 centimeter equals 10 millimeters. So, to convert centimeters to millimeters, multiply by 10.
   6.5 cm×10=65 mm6.5 \, \text{cm} \times 10 = 65 \, \text{mm}6.5cm×10=65mm.
6. 45 cm = 450 mm
   Explanation: Multiply by 10 to convert centimeters to millimeters.
   45 cm×10=450 mm45 \, \text{cm} \times 10 = 450 \, \text{mm}45cm×10=450mm.
7. 8 m = 800 cm
   Explanation: There are 100 centimeters in 1 meter. So, to convert meters to centimeters, multiply by 100.
   8 m×100=800 cm8 \, \text{m} \times 100 = 800 \, \text{cm}8m×100=800cm.
8. 135,000 m = 135 km
   Explanation: There are 1,000 meters in 1 kilometer. To convert meters to kilometers, divide by 1,000.
   135,000 m÷1,000=135 km135,000 \, \text{m} \div 1,000 = 135 \, \text{km}135,000m÷1,000=135km.
9. 0.5 km = 500 m
   Explanation: To convert kilometers to meters, multiply by 1,000.
   0.5 km×1,000=500 m0.5 \, \text{km} \times 1,000 = 500 \, \text{m}0.5km×1,000=500m.
10. 2.5 km = 2,500 m
    Explanation: Again, multiply by 1,000 to convert kilometers to meters.
    2.5 km×1,000=2,500 m2.5 \, \text{km} \times 1,000 = 2,500 \, \text{m}2.5km×1,000=2,500m.

Summary of Results:

1. 780 mm = 78 cm
2. 25,000 cm = 250 m
3. 7 km = 7,000 m
4. 0.5 cm = 5 mm
5. 6.5 cm = 65 mm
6. 45 cm = 450 mm
7. 8 m = 800 cm
8. 135,000 m = 135 km
9. 0.5 km = 500 m
10. 2.5 km = 2,500 m