Can anyone please help me which statement is not correct? (use estimation to decide please)

Step-by-step explanation:

A is correct.

2/3 > 4/8

5/9 > 7/12    This one is close. They are both nearly 1/2, but 9<12 and when you divide something by 9 the remainder is going to be larger than if you divide by 12.

The second one is incorrect.

3/4 > 5/9    5/9 is close to 1/2. Three quarters is much greater than 1/2

3/10 is much smaller than 5/9

The third one is correct. 1/10 and 5/6 are much larger than the two fractions on the right. The right side = 56/60 which is very nearly one. The left side is nowhere near that large. (I did estimate the right side).

The fourth one is correct. 9/10 is much larger than 2/3 and 5/9 is larger than 5/12. 5/9 is over 1/2 and 5/12 is under one half. So the arrow in the fourth one is going the right way.

hello,

as   long as they add up to 180 its correct.