One-Step equations (+)
a + 3 = 8
a=5
a + 3 = 8
- 3 -3
a = 5
a - 5 = 4
a=9
a - 5 = 4
+5 +5
a = 9
5a = 25
a=5
5a = 25
/5 /5
a = 5
a/9 = 9
a=81
a/9 = 9
*9 *9
a = 81
Give me an example of a variable.
any letter
s, x, n, w, y, z, ...
x + 38 = 90
x=52
x + 38 = 90
- 38 -38
x = 52
a - 128 = 137
a=265
a - 128 = 137
+128 +128
a = 265
20n = 600
n=3
20n = 600
/20 /20
n = 3
a/7 = 35
a=245
a/7 = 35
*7 *7
a = 245
What's the inverse operation of division?
Multiplication
a + 9.4= 16.6
a=7.2
a + 9.4 =16.6
- 9.4 -9.4
a = 7.2
a - 11.5 = 30
a=41.5
a - 11.5 = 30
+11.5 +11.5
a = 41.5
2g = 128
g = 64
a/10 = 40
a=400
a/10 = 40
*10 *10
a = 400
What is the inverse operation of addition?
Subtraction
x + 1/2 = 1
x = 1/2
r - 8/5 =9/5
a = 17/5 or 3 2/5
9/5 = r - 8/5
+8/5 +8/5
17/5 = r
1.2y = 14.4
y=12
1.2y = 14.4
/1.2 /1.2
y = 12
a/0.2 = 14
a=21.6
a/0.2 = 14
*0.2 *0.2
a = 2.8
Name the 4 operations.
Addition, Subtraction, Multiplication, and Division
a + 86 = -98
a=-184
a + 86 = -98
- 86 -86
a = -184
a - 19.2 = 55.6
a=74.8
a - 19.2 = 55.6
+19.2 +19.2
a = 74.8
4/5z=6/7
15/4 =z
6/7 = 4/5z
/4/5 /4/5
30/28 = z
b/5=4/5
b = 4
Define inverse operation.
Using the opposite operation from what is given in the problem.