I need help with my japanese homework ><
 

We haven't got far enough in my japanese class to get the lab work done that is due soon.

They talk too fast, but that isn't what I need help on.

I don't understand time. I understand hours, but what do they say when it isn't on the hour? (We haven't talked about it in my class yet.)
Also I need help on how to add subtract and multiply. (How do they say it?)

I don't know if anything I'm saying makes sense.

All we've done so far is learned most of hiragana-we're on the y's and r's.

Okay first of all, time - like in English - can be expressed in different ways (eg. five forty-five and a quarter to six can be both expressed in Japanese). So if you wanted to say five forty-five, you'd write it as 5時45分 (goji yonjyuugofun). Let's look at another way to express time.

To say XX minutes to XX o'clock, 前 (mae) is used. To say XX mins past XX o'clock, then 過ぎ (sugi) is used. For example, a quarter to six would be 6時15分前 (rokuji jyuugofun mae) and a quarter past six would be 6時15分過ぎ (rokuji jyuugofun sugi). Half past XX o'clock would be XX 時半 (XX ji han). IMO you should master this with ease since many of the concepts and rules of Japanese time overlap what you already understand in English.

足し算　(tashizan) is addition, 引き算　(hikizan) is subtraction and 掛け算　(kakezan) is multiplication.

An addition sum phrased in Japanese: 1 + 2 = 3 -> Ichi tasu ni wa san (since a mathematical sum isn't really written in Japanese, I just used romaji here. If you want it in Japanese, let me know. BTW, the symbol in bold corresponds to the word in bold)

A subtration sum phrased in Japanese: 8 - 2= 6 -> Hachi hiku ni wa roku.

A multiplication sum phrased in Japanese: 2 X 3 = 6 -> Ni kakeru san wa roku. (there's also another way to read multiplication sums, similar to saying six sixes are thirty six in English)

EDIT: This site should cover a few things that weren't mentioned in my post > Telling time