Question

8дм 4см+9см. 4км720м+580м. 17см 4мм*6. 2км300м*7. 13м-6дм5см. 8дм3 см-75мм. 7дм8см:3. 6м30см:9

Answer 1

=84см+9 см=93 см=9 дм 3 см

=4720 м+580 м=5300 м=5 км 300 м

=174 мм*6=1044 мм=104 см 4 м

=2300 м*7=16100 м=16 км 100 м

=1300 см-65 см=1235 см=12 м 3 дм 5 см

=830 мм-75 мм=755 мм=7 дм 5 см 5 мм

=78 см:3=26 см=2 дм 6 см

=630 см:9=70 см

Answer 2

Let's solve the given arithmetic expressions step-by-step:

1. 8дм 4см + 9см First, we need to convert everything to centimeters (1 дм = 10 cm): 8дм 4см = 8 * 10 cm + 4 cm = 84 cm Now add 9 cm: 84 cm + 9 cm = 93 cm

   Answer: 93 cm

2. 4км 720м + 580м First, we need to convert everything to meters (1 км = 1000 m): 4км 720м = 4 * 1000 m + 720 m = 4720 m Now add 580 m: 4720 m + 580 m = 5300 m

   Answer: 5300 m

3. 17см 4мм * 6 First, we need to convert everything to millimeters (1 см = 10 mm): 17см 4мм = 17 * 10 mm + 4 mm = 174 mm Now multiply by 6: 174 mm * 6 = 1044 mm

   Answer: 1044 mm

4. 2км 300м * 7 First, we need to convert everything to meters (1 км = 1000 m): 2км 300м = 2 * 1000 m + 300 m = 2300 m Now multiply by 7: 2300 m * 7 = 16100 m

   Answer: 16100 m

5. 13м - 6дм 5см First, we need to convert everything to centimeters (1 м = 100 cm and 1 дм = 10 cm): 13м = 13 * 100 cm = 1300 cm 6дм 5см = 6 * 10 cm + 5 cm = 65 cm Now subtract: 1300 cm - 65 cm = 1235 cm

   Answer: 1235 cm

6. 8дм 3см - 75мм First, we need to convert everything to centimeters (1 дм = 10 cm and 1 мм = 0.1 cm): 8дм 3см = 8 * 10 cm + 3 cm = 83 cm 75мм = 75 * 0.1 cm = 7.5 cm Now subtract: 83 cm - 7.5 cm = 75.5 cm

   Answer: 75.5 cm

7. 7дм 8см : 3 First, we need to convert everything to centimeters (1 дм = 10 cm): 7дм 8см = 7 * 10 cm + 8 cm = 78 cm Now divide by 3: 78 cm / 3 = 26 cm

   Answer: 26 cm

8. 6м 30см : 9 First, we need to convert everything to centimeters (1 м = 100 cm): 6м 30см = 6 * 100 cm + 30 cm = 630 cm Now divide by 9: 630 cm / 9 = 70 cm

   Answer: 70 cm

I have performed the calculations for each expression, and these are the results. If you have any more questions or need further assistance, feel free to ask!