Answers to the notes of Algebraic answers

1. a+5=7        2. b-6=3     3. 2=s-5      4. 7=4+d         5. 3g=18        6. 12=4k       7. 5= k/5        
                                                                                                                      
8. z/7=3         9. 2n+4=14

Answers
1. a=2
2. b=9
3. s=7
4. d=3
5. g=6
6. k=3
7. k=25
8. z=21
9. n=5

Divisibility

Divisible- means when a number can be divided by another number with no remainder or decimal

Here are divisibilty rules

1- all numbers
2- even numbers
3- sum of the digits is divisible by 3
4- divisible by 2 twice
5- ends in 0 or 5
6- divisible by 2 and 3
8- divisible by 2 thrice
9- sum of the digits is divisible by 9
1o- ends in 0

Turning decimals into fractions

                 x100 x2                                  To turn o.54 into a fraction you times it by 1oo now its 54
           o.54= 54  =27                                              1                                                                    100
              1  = 100=50                               You could still divide it by 2 so the answer is 27            
                 x100 x2                                                                                                            50

Bedmass

(34.67 + 23.65) x 5.6 /11.2
First we do 34.67 + 23.65 because its in brackets
58.32x 5.6 /11.2
Now we do 58.32 x 5.6 because its before the divide
326.592 /11.2
Last we divide
Answer is 29.16

Review Transformations

Translation- a slide along a straight line
Rotation- turn about a fixed point
Reflection- mirror image

Translation                                    Rotation                                                       Refection
eg. .__________________.                eg.      A.__________B.                                 A
                                                                                                                          ____________                                                                  
                                                                                                                                   A'
                                                                       B.

Subtracting Fractions with like denominators #4-5

4.a)6/6-2/6=4/6=2/3
b)2/3-1/3=1/3
c)4/6-1/6=3/6=1/2

5.a)2/3-1/3=1/3
b)3/6-1/6=2/6=1/3
c)4/4-1/4=3/4

#2 Order of Operations

(102+1)-15\3x3

do the ones n the brackets first so 10x10=100+1=101

next do 15\3=5 then times it by 3=15

last but not least do 101-15=86

#6,8,9,10,11 Number of the Day

Today's number is 3648.972

6.7297.944

8.74

9.7x7x7x7

10.512

11.36

#1-5 Number of the day

Today's number is 3648.972

1.1824.486

2.3000+600+40+8+0.9+o.07+0.002

3. Three thousand six hundred forty eight and nine hundred seventy two thosandths

4.3600

5.9

Divisibility Rule for 2

All of the even numbers are divisible by 2

like numbers that end in 0,2,4,6,8

Divisibility Rule For Five

All numbers ending in 5 or 0

eg. 5,10.15,20,25 etc.


Try 10= yes because it ends in 0
25= yes because it ends in 5
12= no because it ends in 2

Rule For 4

4=2x2

All numbers that can be divisible by 2 twice and its still a whole

eg.

Chapter 4 Review Question 7

________._______

36 37 38 39 40 41 42

I think it's 39.2 because it's not exactly at 39, it's a little to the right and the lines are close so I added 1 more

Math Textbook pg.138 question 8

_
a] 0.5555555= 0.5
__
b] 0.090909= 0.09
_
c] 0.1877777= 0.187
__
d] 2.0151515= 2.015

Order of Operations

3x4+12 divided by 2

12+12 divided by 2

12+6

18