Question

7дм 45 20кг 2ц8дм 80см1дм6см-9см=71ц+3ц=1м-60см=98кг-3кг=87кг-6кг=​

Answer 1

70-45= 25см

20-200= -180кг

80-80=0см

16-9=7см

71+3=74ц

100-60=40см

98-3=95кг

87-6=81кг

Answer 2

Let's calculate the given expressions step by step:

1. 7дм - 45 = -38дм
2. 20кг - 2ц8дм 80см1дм6см - 9см = 20кг - (2ц8дм + 80см + 1дм + 6см) - 9см

To subtract the centimeters, we need to convert them to decimeters by dividing by 10: 20кг - (2ц8дм + 8дм + 1дм + 6дм) - 0.9дм 20кг - (2ц8дм + 15дм) - 0.9дм 20кг - (2ц23дм) - 0.9дм 20кг - 2ц23.9дм

Now, let's subtract the kilograms: 20кг - 2ц23.9дм = 20кг - 23.9кг = -3.9кг

So, the result is -3.9кг.

3. 71ц + 3ц = 74ц

4. 1м - 60см = 1м - 6дм = 1 - 6 = -5дм

5. 98кг - 3кг = 95кг

6. 87кг - 6кг = 81кг

Therefore, the final results are as follows: -38дм, -3.9кг, 74ц, -5дм, 95кг, 81кг.