Question

1) 8:2 = 0,4 ; 1; 2) 1/4=0,2/0,83) 7: 0,1 = 21 : 0,3;4) 9/2 =2,7/0,6; 5)42 :6 = 1 : 1/7 6) 5/2 = 0,5/0,02​

Answer 1

1) 8 : 2 ≠ 0,4 : 1     ⇒  8 : 2 = 4 : 1;

2) 1/4 = 0,2/0,8,

3) 7 : 0,1 = 21 : 0,3;

4) 9/2 =2,7/0,6;

5) 42 : 6 = 1 : 1/7,

6) 5/2 ≠ 0,5/0,02    ⇒     5/2 = 0,5/0,2,

Answer 2

Let's break down each of these equations to see if they are correct or not:

1. 8:2 = 0.4; This equation is not correct. 8 divided by 2 is equal to 4, not 0.4.

2. 1/4 = 0.2/0.8; This equation is correct. 1 divided by 4 is indeed equal to 0.25, and 0.2 divided by 0.8 is also equal to 0.25.

3. 7:0.1 = 21:0.3; This equation is correct. When you divide 7 by 0.1, you get 70, and when you divide 21 by 0.3, you also get 70.

4. 9/2 = 2.7/0.6; This equation is correct. 9 divided by 2 is equal to 4.5, and 2.7 divided by 0.6 is also equal to 4.5.

5. 42/6 = 1/(1/7); This equation is correct. 42 divided by 6 is equal to 7, and 1 divided by (1/7) is also equal to 7.

6. 5/2 = 0.5/0.02; This equation is correct. 5 divided by 2 is equal to 2.5, and 0.5 divided by 0.02 is also equal to 25.

So, equations 2, 3, 4, 5, and 6 are correct, while equation 1 is not correct.