Help me with my math practice

1/2 ,2/3,3/4,5/8,4/5. 1/20. 5/8

Step-by-step explanation:

There are a lot of ways you can solve the first one, but I chose this way:

I visualized the fraction. It can help you get a sense of size more quickly and perhaps easier . But I don't recommend to use it during exams , so you will have to learn from somebody else another way

Srry about the messy sketches, I hope you understood the way I solved it. If not, feel free to ask questions!

1 1/5

step-by-step explanation:

to find the perimeter, you add up all the lengths of the sides. in this case you would have to add up 18+22+40+80 which equals 160.