Variables
What is a variable?
letter that replaces a number
27 + w w = 6
33
45 + m = 71
m = 26
What is the reciprocal of 7/2?
2/7
What does substitute mean?
Take the place of or trade the variable out for the number it represents
124 - m m = 31
93
m + 79 = 431
m = 352
2/3 X 4/5 =
8/15
What is the reciprocal of 1 2/5
5/7
Fill in the blank. When we solve for variables, we use the _______ operation.
inverse (opposite)
6r r = 12
72
q - 28 = 62
q = 90
1/10 X 2/3 =
2/30
1/4 divided by 2/4 =
1/2
When you are reading a word problem and trying to write an equation, when would you put a variable in it?
When there is a value you don't know
p / 5 p = 150
30
103y = 618
y = 6
5 x 3/4
15/4
3/4 divided by 2/9
27/8
Write an equation using a variable.
Answers vary
2 + 4g g = 12
50
495/b = 55
b = 9
6 x 2/5
12/5
5/9 divided by 3/8
40/27