# math

posted by on .

please check and see if my answers are correct if not let me know so i can redo these and find where i messed up

1. divid by moving the decimal point
27.3 dived 10^5

2.Jon spent 1/3 of his study time doing math homework and 2/7 preparing for a history exam. What fraction of his study time remains?

3.find the least common multiple of 10,15,25.

4. Kristi jogged for 3/5 of an hour, swam for 1/2 of an hour, and rode her bicycle for 3/4 of an hour. How long did she exercise?

#2
2/7=6/21
1/3=7/21
6/21 + 7/21=13/21
21/21 - 13/21=8/21
otherwise it looks ok

• math - ,

I am still not understanding how you arrived at number 2

• math - ,

Find the five-number summary of the following set of numbers.

0.16, 0.08, 0.27, 0.20, 0.22, 0.32, 0.25, 0.18, 0.28, 0.27

• math - ,

Write in decimal form.94 17/ 1,000

• math - ,

Jon spent 1/3 of his study time doing math homework and 2/7 preparing for a history exam. What fraction of his study time remains?

You need to find the LCM (21) that will give you 7/21 and 6/21. "REMAINS" indicates that you will subtract so 7/21 - 6/21 = 1/21.

Hope that helped.

• zemwp mregaknxt - ,

ulzi cwfrj jmoblcux kubzt tjvhb ylinqk pzxltej