**Link for prime factorization and all factors, with practice examples.**

**Roman and Hindu-Arabic numerals, fractions and decimals.**

**Practice for Roman to Hindu-Arabic and vice versa, fractions and decimals.**

**Practice for time conversion**.

The following problems are in the form minutes:seconds. If the answer gives more than 60 minutes, write the answer as hours:minutes:seconds. Answers to the question below are in the comments.

18:34

__- 6:58__

42:23

41:07

43:01

42:18

__+42:17__

## 1 comment:

Borrow a minute to make 60 more seconds

17:94

- 6:58

______

11:36The sums of the minutes and seconds separately are

208:66

66 seconds becomes 1:06 and added to the minutes we get

209:06

209 divided by 60 gives us 3 hours and 29 minutes so the final answer is

3:29:06.Post a Comment