50 cents is/are how much I owe you

[ngoc_lan]

My teacher asked me to give the correct tense to this sentence:
50 cents (be) _____ how much I owe you.
I'd choose is because I think "50 cents" is an amount of money, so it can't be plural.
Is it right?

Oh, one more thing. Are these words plural?
a. 0.5 meter(s).
b. 1.5 meter(s).
c. one third of the apples is/are green.
d. two third of the apples is/are green.
I'm not sure about a and b. I'd choose is for c and are for d.

I hope you will help me. Thanks a lot!
ngoc_lan

[bhaisahab]

My teacher asked me to give the correct tense to this sentence:
50 cents (be) _____ how much I owe you.
I'd choose is because I think "50 cents" is an amount of money, so it can't be plural.
Is it right? Yes.

Oh, one more thing. Are these words plural?
a. 0.5 meter(s). Q. "How many metres is it?" A. "It's 0.5 metres."
b. 1.5 meter(s). Q. "How many metres is it?" A. "It's 1.5 metres."
c. one third of the apples is/are green. Either is OK IMO.
d. two thirds of the apples are green.
I'm not sure about a and b. I'd choose is for c and are for d.

I hope you will help me. Thanks a lot!
ngoc_lan

Bhai.

[5jj]

I agree with bhaai on the other answers, but I'd say only "One third of the apples are green".

[ngoc_lan]

Thanks. But what does OK IMO mean?

[bhaisahab]

Thanks. But what does OK IMO mean?

"Okay in my opinion."

[ngoc_lan]

I've picked up one more abbr.. Thanks!