I don’t understand this question

They are asking you to subtrack 9/10 from 1 2/5.

You can achieve this by finding a common denominator for these 2 fractions and then subtracting it.

So, we know that the common denominator is 10 because 5*2=10.

We then change the fraction to 1 4/10.

Then you subtract 9/10 from 1 4/10

1 4/10 can be rewritten as 14/10.

14/10 - 9/10 = 5/10 = 1/2

Step-by-step explanation:

Step-by-step explanation:

Your question doesn't match the picture. OCR is often inaccurate!—not that it matters much in this case. None of the choices is correct.

(20-4)·6² + 2 + 18 = 16·6² + 2 + 18

= 16·36 + 2 + 18

= 576 + 2 + 18

= 578 + 18

= 596