Question

6дм.7см.-4дм. 6дм.7см.-4см. 5дм.4см.+3см. 5дм.4см.+3дм.

Answer 1

2дм.7см. 6дм.3см. 5дм.7см. 8дм.4см.

Answer 2

To simplify the given expression, let's perform the arithmetic operations step by step:

1. Add the lengths with the same units (decimeters, centimeters): 6дм. 7см. + 6дм. 7см. = 12дм. 14см. (Adding the decimeters and then the centimeters separately)

2. Subtract the next length: 12дм. 14см. - 4см. = 12дм. 10см.

3. Add the following lengths: 12дм. 10см. + 5дм. 4см. = 17дм. 14см.

4. Add the last lengths: 17дм. 14см. + 3см. = 17дм. 17см.

5. Finally, add the last two lengths: 17дм. 17см. + 3дм. = 20дм. 17см.

So, the simplified expression is 20 decimeters and 17 centimeters.