Math Review Exam Slide 22

Just to let you know the colours and the bold in my text might not show up so I'm sorry for that part. Because when I previewed it it didn't show any of that.

Divisibility Rules

Divisibility~Means when a number can be divided by another number, with no remainder or decimal.

Its a whole number.

Divisibility Rules

0 ~ 0 can't go into anything.

1 ~ 1 goes into all numbers.

2 ~ if the number is even.

3 ~ the sum of the digits have a multiple of 3. In your review it says sum of the digits is 3, so make sure you know.

4 ~ if you can divide the number twice by two and still have a whole number.

5~ if the number ends in 0 or 5

6 ~ if 2 and 3 can go into the number.

8 ~ if you can divide the number thrice by 2 and get a whole number.

9 ~ sum of the digits is nine.

10~ ends in 0

Try practicing your divisibility rules by finding out which one of the divisibility rules go into these numbers.

Answers

Here is a link to help you practice xD

Here is a video to help you out :)

Math Exam Review Slide 23

Adding and Subtracting Fractions
















So the question is 1/2+1/2 = 2/2, but that isn't good enough because you have to always simplify when it can be simplified. So its 1/1 then 1 whole. First you always check for common denominators. If your fractions have the same denominator you leave them the same and just add the numerators.

Subtracting















The question was 3/4 - 1/4=2/4=1/2. ( make sure you don't forget to simplify.) First you check for common denominators. In this question they are the same so just take away the two numerators.

Try these questions to help you practice :).

2/3+4/5=
6/7+2/8=
2/3-1/3=
4/5- 2/5=

Answers...

1. the common denominator is 15. So whatever you did to get 15 u do to the numerators. So 2x5=10 so its 10/3, then 4x3= 12 so its 12/5. So 10+12 = 22 and the denominators stay at 15. Its 22/15. Now you have to simplify it to 1 whole and 7/15.

Since I already told you how to do this I'm just gonna give you the answers now.

2. 1 whole and 3 /28

3.1/3

4. 2/5

Here is a link to help you. :)







GoAnimate.com: Adding and Subtracting fraction by soto


Heres a video to help you (:

My probability question

What is the probability of the rock landing on the 2 on the hopscotches. What is the probability of both stones landing on 2? And list the other possible outcomes there can be. For example if there was two coins and the other possible outcomes are that it will land on heads and heads, tails and tails, tails and heads, and heads, and tails. Use a table, chart or a tree digram to show your work.

Here is a link to have some practice on answering probability questions. PROBABILITY!