7см+8см> 1дм+7 см

To compare these measurements, we need to convert them to the same unit. Let's convert everything to centimeters:

7 cm + 8 cm > 1 dm + 7 cm

1 dm is equal to 10 cm, so we can rewrite the equation as:

7 cm + 8 cm > 10 cm + 7 cm

Now let's simplify:

15 cm > 17 cm

Since 15 cm is less than 17 cm, the inequality is false.

Therefore, the statement "7 cm + 8 cm > 1 dm + 7 cm" is not true.